Toono Ao failed to get into college and became a ronin, studying for next years exams instead. To better study for them, Ao moved out to live on his own into an apartment near his cram school. It's not much, but it's a place to call his own. But not long after moving in, a drunken lady finds her way into his new home! It doesn't matter how hard he tries, she just continues to make herself at home and take advantage of him. This is not okay! ...Or is it? His humble castle is no longer his own. Onee-san is invading!
Onee-San Is Invading!? has finished publishing and it has 40 Chapters. It is also Known as: Oneesan ga Shinryakuchuu!?, おねーさんが侵略中！, Onee-San Is Invading!?
Genres: Seinen , Romance , Slice of Life , Ecchi , Comedy , Sudden Girlfriend Appearance , Japan
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Top 5 Manga Like Onee-San Is Invading!? [2025 List]
5. Kanojo no Tomodachi
He got a cute girlfriend who was the first in his life, but her friend tempted him with a body that was lewder than her ... What would you do if your girlfriend's friend pressed you like this?
Source: MU
My Girlfriend's Friend is currently publishing and has Chapters. It is also Known as: 彼女の友達, Kanojo no Tomodachi
4. Gaishuu Isshoku!
A doormat of a realtor who's not over his last breakup. A blackmailing, foul-mouthed young female mangaka who's run away from home. Put them under one roof and this is probably what you'd get.
Gaishuu Isshoku! is currently publishing and has Chapters. It is also Known as: ガイシューイッショク！, Gaishu Isshoku, Gaishuu Isshoku, Guy Shooting It!
3. Kaette kudasai! Akutsu-san
Timid Ooyama keeps to himself at school, and he certainly never gets involved with Akutsu Riko, a delinquent as buxom as she is notorious. But when she turns up at his apartment out of the blue, what’s he supposed to do, kick her out? She’s gorgeous! And scary! But things get complicated when Akutsu asks to stay the night, then starts turning up over and over again after school–reading Ooyama’s manga, sprawling out on his bed, and digging up his smut stash. Why exactly is she claiming his life as her hangout?! She makes it clear there’s no way she could possibly like him, but the teasing threatens to boil over into something more in this sexy yet adorable slice-of-life rom-com!
Please Go Home, Akutsu-san! is currently publishing and has Chapters. It is also Known as: 帰ってください！ 阿久津さん, 求妳快走吧，阿久津！, Please Go Home, Akutsu-san!, Yankee Musume, ヤンキー娘
2. Choppiri toshiue demo kanojo ni shite kuremasu ka?
First-year highschool student Momota Kaoru just saved a beautiful highschool girl, Orihara Hime, from a train molester. One thing leads to another, and they end up going on a date! They have a lot in common: they both love video games, they both jam to their favorite songs on mixtapes, they were even both born in the Year of the Snake.
Except... Orihara's first game console used cartridges... and her old mixtapes are all on MiniDisc... and, oh, her birthday is actually 12 years before Momota's!
When her secret comes out, she thinks it must all be over... but will Momota really let something like a little age gap get in the way of his love for Orihara? Find out if love really can transcend generations in this sugar-sweet romantic comedy!
Are You Okay With a Slightly Older Girlfriend? is currently publishing and has Chapters. It is also Known as: ちょっぴり年上でも彼女にしてくれますか?, The JK I liked was 27 years old, She was a little older than he, Can you make him a little older?
1. Rounin-sei to Eroi Yatsu
Rounin-sei to Eroi Yatsu is currently publishing and has Chapters. It is also Known as: Rouninsei to Eroi Yatsu, The Ronin and the Sexy Thot
