Iriya no Sora, UFO no Natsu - Recommendations

• Vol: 6+; Ch: 48+
• 2019 - ?

• Vol: 19+; Ch: 162+
• 2010 - ?

Nogawa Izumi is a good student, and a class representative, but she has an increasingly high libido. It's gotten to the point that she'll claim to feel bad during class, so she can run to the nurse's office and masturbate. When she learns that the Earth is being invaded by aliens that look like people dressed up as animals, it turns out her high sex drive may be able to help protect the Earth. The first time Izumi is attacked by the aliens, she is rescued by Usayama, a bunny alien whose race was their previous victim. Usayama gives her an outfit (a sexy swimsuit) that will allow her to fight the aliens, but which also sends her constant arousal through the roof. The scientific organization that Usayama is affiliated with think that Izumi, with her high erotic level, may be the person they've been looking for to fight the aliens. Will Izumi be able to save the Earth? 

• Vol: 3; Ch: 17
• 1985 - 1995

Featuring unorthodox archaeologist Hieda Reijirou and his encounters with the unknown.

• Vol: 2; Ch: 10
• 2020

Hundred years ago, humans left the nuclear-contaminated Earth and settled on a new planet called ‘Tarka’. Nicholas, a low-level contributor who worked at a mining farm, lived hard day by day with his two sons—Logan and Dustin. However, one day, during the long rainy season, as he and other workers took a morning break, the TV in the break room suddenly broadcasted an unbelievable scene: the city had been invaded by the Cordollians! Terrified, the middle-aged man ran several hours home. He slammed the door house. But his two sons were nowhere to be found. Instead, two tall bizarre figures were standing in the dim house. Nicholas met the blazing bright yellow eyes of the figures. He froze. “Oh, my beloved sons have turned into monsters.”

• Ch: 35
• 2020 - 2021

Eaters — intelligent creatures from outer space that prey on Earthlings. Problem is, even though they look like humans, no one knows how to talk with them! Enter Yuli, the only known human to date who can communicate with the Eaters. Can Yuli save the world AND her love life?

• Vol: 1; Ch: 3
• 2013

Reiko finds a starving mysterious animal that looks like a cat with wings. To the girl's surprise this cute animal names itself a space salesman that would sell advanced technology to humans for just a bit of hahise, which is abundant on Earth. But what is hahise? Would you pay it for a machine that can copy anything?

• Vol: 1; Ch: 8
• 2010

Includes the following chapters:

• 1. Yume-Zamurai
• 2. Sengoku Juuhei Magoichi
• 3. Raiden Tokkou
• 4-5. Dangan Gaki
• 6. Chigusa-touge no Arashi
• 7. Rapid Fire
• 8. Gaikou Kakkaku

• Vol: 14; Ch: 73
• 2009 - 2015

Alice is a high school student who faces bullying at school and abuse at home by her uncle. One day, she witnesses her uncle being killed by an assassin called "Arachnid." Thinking that she'll be killed next, Alice has no choice but to fight back. Soon after, she wakes up at Arachnid's house, and he takes her in as his deadly apprentice.

• Vol: 16; Ch: 88
• 2013 - 2021

Our hero Ryouta Arata is an otaku who's just lost his job after the dissolution of his company. Unwilling to return to his old NEET ways, he applies online to a private military security company, thinking the benefits to be promising. After what appears to be a baffling test, he's assigned to be an "operator of operators" and begins his training in a foreign country. Little does he know, the life of a private mercenary is far more grueling than he could have ever imagined!

• Vol: 17; Ch: 76
• 2001 - 2007

Munsu is an Angyo Onshi - an arbiter for the country of Jushin. Fighting evil is all he knows, but since Jushin has recently collapsed, what is he fighting for? Wandering from place to place, Munsu finds himself battling those who would further destabilize the country, whether they be arms dealers, smugglers, tyrants, or necromancers. Accompanied by a female warrior named Chun Hyang and able to call upon the strength of a ghostly legion with his Angyo Onshi powers, Munsu sets out to help those who are willing to take a step towards helping themselves, and bring justice against all that is evil in the world.