Please Save My Earth

Alt title: Boku no Chikyuu o Mamotte

If you're looking for manga similar to Please Save My Earth, you might like these titles.

Lucifer and the Biscuit Hammer

Lucifer and the Biscuit Hammer

Yuuhi Amamiya is a loner whose mistrust of people was instilled in him at a young age by his abusive grandfather. So when an annoying talking lizard tells the university student that he is one of twelve knights chosen to stop the gigantic "biscuit hammer" before it smashes the Earth to smithereens, Yuuhi has no inclination to rescue such an unkind world. Despite his apathy, the boy is targeted by a golem while going about his day-to-day life, and ends up teaming up with the other knights anyway. One of his new companions is Samidare Asahina, the "princess" and leader of the knights, who secretly is only trying to protect the Earth so she can destroy it herself! Entranced, Yuuhi swears eternal loyalty to this cheerful devil that promises to crush the world he despises.

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Reasons you might like Lucifer and the Biscuit Hammer...

JAhU JAhU says...

Please Save My Earth and Hoshi no Samidare felt similar for some reason. It's difficult to explain, so I won't even try to do so. If you can trust my gut feel, then go and check out the one you haven't read yet. Heck, you might actually like it.

Dear Mine

Dear Mine

Satoko is a domestic girl with a kind heart. She lost her father when she was little, and her family has been very poor ever since her father's company shut down. However, life is happy enough when you are optimistic, and Satoko enjoys her daily life heartily. One day, she is rescued from a attacking dog by Fuuma, an extraordinarily mature 10-year-old boy. Little does Satoko realize that this boy is the head of Wakudera Corporation, as well as her future husband!

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Reasons you might like Dear Mine...

JAhU JAhU says...

Please Save My Planet comes packed with some heavy drama, on the other hand Dear Mine is just a light shoujo with sugar and fluff. Both of those feature a couple with a noticeable age difference (mostly due to the fact that the guy is a grade school student). If after reading Please Save My Earth you realized that you were after something (much) lighter on drama, then Dear Mine might actually suit your taste.

MeruPuri

MeruPuri

Airi has always dreamed of marrying her fated true love and living a normal, happy life – a dream disrupted forever when Aram, a prince from another world, emerges from her grandmother’s mirror. She takes the young prince home with her thinking he is a lost child, giving him a home cooked meal and a place to sleep. However, in the morning she discovers that, as the result of a magic spell, Aram transforms into a 17-year-old boy whenever it’s dark, and her kiss is the only way to change him back! If that wasn’t enough, Aram is in hiding from his older brother, the evil sorcerer Jeile, who has fallen in love with Airi and intends to make her his bride! Will Airi ever be able to find her happily-ever-after?

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Reasons you might like MeruPuri...

JAhU JAhU says...

So, Merupuri also sports this grade school aged kid who is quite mature for his age and who also happens to be in love with a high school girl. The thing is, Merupuri ends up being a pretty much generic shoujo and the plot isn't its strong part. Anyway, if you found the drama to be too much in Please Save My Earth, then you might actually like Merupuri.

Kanade

Kanade

A high-school student has been seeing visions of a girl in his dreams, when suddenly he meets her at school. Oddly, they can both see (and touch) each others guardian spirits. What is relationship between them, their guardians and the truth behind the dreams?

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Reasons you might like Kanade...

JAhU JAhU says...

Both series feature a reincarnation themed love polygon of sorts. If you found that theme interesting in one series, be sure to check the other one as well.

Kumiko & Shingo

Kumiko & Shingo

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Reasons you might like Kumiko & Shingo...

JAhU JAhU says...

Both of those series are fairly long shoujo about a high school girl x elementry school boy romance. Both have very oldschool art style and fairly good story. Kumiko & Shingo has none of the sci-fi/fantasy elements that Boku no Chikyuu wo Mamotte features, but hopefully it won't prevent you from reading one if you read the other.

Alive: The Final Evolution

Alive: The Final Evolution

Taisuke Kanou is a student who's lived alone with his sister since the death of his parents years ago. Though he's often in the middle of a fight, Kanou lives a fairly typical life alongside his bullied friend Yuichi and the lovely Megumi - that is, until the suicides begin. Suddenly, around the globe, people have begun to kill themselves in throngs thanks to what people are calling a ‘suicide virus.' Once ‘infected,' a person either dies by his own hand or evolves and gains a special power. As Taisuke soon discovers, he's one of the evolved, as is Yuichi; but Yuichi, coerced by other ‘comrades' with similar powers, kidnaps Megumi and leaves with his newfound friends. Taisuke must now head north in an attempt to find Megumi and Yuichi, all the while encountering new friends and dangerous enemies along the way.

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Reasons you might like Alive: The Final Evolution...

WellChild WellChild says...

Both stories have similarities. They both loosely involve aliens, have kids with powers, see alliances form between main characters, and said main characters are always searching for other power users/reincarnations. There's trust, betrayal, evil plots and a fair amount of moral ambiguity with both casts of characters. 

Hajimari no Niina

Hajimari no Niina

10-year old Niina is special. This is because she has the memories of her past life as a girl named Chitose still intact. Among these memories is a promise with Chitose's boyfriend which Niina then decides to try and fulfill. But can she really?

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Reasons you might like Hajimari no Niina...

AnnaSartin AnnaSartin says...

Both stories explore the concept of reincarnation, and feature characters who struggle to understand what it truely means to progress from one life to the next. How connected are you to the person you once were, and to the people you once knew in a former existance? Is it possible to move on when you still possess memories from before you were born? Will attempting to somehow "merge" the past and present solve your dilemma or make it worse? Interesting stories in both cases.

Life

Life

Ayumu Shiiba is studying for the all-important high school entrance exams. She is struggling to get by, but thankfully has help from her best friend Shii-chan, who is at the top of their class. Test results come back and their friendship falls apart when Ayumu surpasses Shii-chan’s scores and gets into her high school of choice while Shii-chan doesn't! Losing Shii-chan is so painful for Ayumu that she starts cutting her wrists for comfort. Hoping for a fresh start, Ayumu arrives at her new high school and finally opens up to a new friend, Manami. But will Manami prove to be the friend that Ayumu truly needs or send her further in a downward spiral?

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Shadow Star Narutaru

Shadow Star Narutaru

Shiina is a sixth-grade tomboy whose brave and adventurous nature almost causes her to drown in the ocean. However, from the experience she meets a ‘Shadow Dragon' that she names Hoshimaru; strangely silent and star-shaped, it has the ability to shape shift and fly. Soon, Shiina makes yet another new friend: a troubled girl named Akira who happens to also acquire a Shadow Dragon. Yet Shiina and Akira aren't alone - others besides them have Shadow Dragons, and not all of them have such innocent intentions. Furthermore, the Japanese Military has taken an interest in the creatures' combative uses. What are the Shadow Dragons, where did they come from and what is their ulterior motive? Shiina is determined to find out...

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Nayuta

Nayuta

Nayuta is a normal school girl, until she meets a young boy named Kiro trying to help his sick mother. Nayuta takes them to the hospital, but there Kiro's mother vanishes without explanation and Kiro runs away. Later that night Kiro shows up at Nayuta's house and shows her his psychic powers, enabled by a mysterious tiara he wears.

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