Keiichi Morisato is just your average college student until one day, fate interjects as he makes a call for take-out food. Unknown to him, he reaches the Goddess Help Line, and contacts a goddess named Belldandy, who grants him a wish. Thinking it to be a joke, Keiichi wishes for her to be his girlfriend 'forever'.
While trying to protect a wooden relic, high school student Yuuri Mito summons the Goddess Kikuramikami no Hime in the form of a sweet, affectionate child; she begins to live with him, taking the name Mashiro. Yuuri promises to marry her when she grows up, which unfortunately for him happens overnight! However, they soon have bigger things to worry about, as the relic is accidentally destroyed, unleashing the Tayutai, a human-hating race of monsters. Along with Yuuri's childhood friend Ameri, his step-sister Yumina and Mifuyu - an honour student at Flawless Girls' Academy - Yuuri and Mashiro must step up to fight the Tayutai, protect the world, and even learn about underwear!
Both of these are romantic comedy harems, where a loser human guy summons a goddess who's completely in love with him. They have the similar herem/ecchi humor in them, so fans of one would enjoy the other.
Due to his parents' work, Riku Aoba is about to transfer to Tsumugino Private High School; but it's no ordinary high school! Unlike other student bodies, Tsumugino's academic system has a great deal of freedom; and as a result, Riku is often dragged into various schemes the student council has created, resulting in him being chased around the school for a prize reward. To make matters even more complicated, three of the most popular girls in school are falling for him. With such a busy school life, how will Riku survive?!
Kazuto Tokino lives his tranquil life attending high school by day and running the family bath house by night; but his peace is all set to change. One fateful day, the Beautiful Princess Valkyrie crashes her spaceship into Kazuto’s public bath, killing the high-schooler outright! In order to revive him, Valkyrie gives the teen half of her soul, with the unfortunate side-effect of reverting the princess back to a child in both body and mind. Now the young Valkyrie is moving in to the bathhouse and, with her brash sister Hydra and over-protective catgirl maid Sanada following close behind, it seems Kazuto’s peaceful life is long behind him…
Both of these series focus on an ordinary guy whose life is turned upside down by the appearance of a girl who he then falls in love with. While Valkyrie is laced with lots more ecchii than Ah! My Goddess, both series also include various seconadary female characters that cause havoc in the protagonist's life. If you liked that about one then you may want to try the other.
Ataru is one of the most desperate womanizers alive, and a man whose life is about to become complicated. When aliens invade, he discovers he has been chosen at random to be mankind’s defender, and must play a game of tag with the beautiful alien princess Lum to decide the fate of the planet! After chasing her with all of his crafty techniques, Ataru finally wins, but his victory also means he must marry the princess herself! Now, with strange alien visitors and a jealous wife to handle, Ataru still manages to keep an eye on his ultimate goal: having his own harem!
Both have their same similarities like a beautiful girl enters the main characters life and thus starts to meddle into his stuff/life. As a result he does not want her to stay with him and etc. But as time goes on he falls for her but hides those feelings.
The warm summer has finally arrived, and the fourth Pia Carrot restaurant is almost ready for its grand opening at Misaki Beach. With stylish new outfits, and the help of Tomomi Aizawa and Sayaka Takai who hail from other Pia Carrot restaurants, the brand new eatery is sure to be a great success. But amongst the hustle and bustle of the oceanside lifestyle, Sayaka and Tomomi can't seem to forget about the loves they left behind. Will they be able to overcome their fear and speak their true feelings?