The head of a boy with a healthy body is unhealthy. How about a girl? A fairly different romantic comedy by the author of "Manga Science" and "Uchuu Kazoku Carlvinson" that starts from a junior high school library and then goes to space?
Reproductive Monument has finished publishing and it has 10 Chapters. It is also Known as: 生殖の碑, Seishoku no Ishibumi
Genres: Comedy , Romance , School Life , Humanoid Alien , Alien , Science Fiction
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Top 5 Manga Like Reproductive Monument (Seishoku no Ishibumi) [2026 List]
5. Yumemi ga Oka Wonderland
Kotarou is a middle-school boy living a mundane life without dreams. His only distraction is to chat with a lively high-school girl he calls "Miss Akogi", who plays the guitar in the street. After a UFO suddenly crashes in the middle of the city, the world around them starts changing in unexpected ways. Suddenly, everything seems possible…
Note: Chapter count includes two extras
Yumemi ga Oka Wonderland has finished publishing and it has 19 Chapters. It is also Known as: 夢見が丘ワンダーランド, Yumemigaoka Wonderland
4. Boku to Uchuujin
Manabu is a 3rd year middle schooler and former student council president. Suddenly he's in charge of a new student Rui but she is no ordinary girl—she's an alien! Manabu loses the chance to be with his crush Mizuho who now has a thing for Rui and gets nose bleeds from her cuteness. The teacher is of no help, her focus and nose bleeds are on Rui's hot cousin who is also an alien!
The new 2nd year student council body also plays a role in the story. The student president Hikaru is short and hot tempered, he is dating the vice president Nozomi who is tall and gorgeous. The treasurer Kazuma is a good looking guy with a great voice, yet he wears a mask and is madly in love with the cute guy secretary named Tooru!
There is another side story BL with Kazuma and Tooru—Kazuma is slowly wearing Tooru down with his love!
Boku to Uchuujin has finished publishing and it has 33 Chapters. It is also Known as: 僕と宇宙人, Me and an Alien
3. Yuri Seijin Naoko-san
The surreal gag manga follows a quiet, timid girl named Misuzu whose older sister Naoko is returning from studying aboard. However, when she hurries home to meet her sister, Misuzu instead encounters Naoko-san, the strange alien from Yuri-sei (Yuri Planet) who loves eroticism, yuri, and girls.
Yuri Seijin Naoko-san has finished publishing and it has 110 Chapters. It is also Known as: 百合星人ナオコサン, The Yurian Naoko-san, Yuri Seijin Naokosan, Yurian Naokosan
2. Tsukiiro no Invader
The astronomical event "Apple Moon" occurs once every 300 years. On that day, Sakuma, while visiting the ocean with his classmate to observe the event, ends up meeting a parasitic alien instead...?
Moonlike Invader has finished publishing and it has 12 Chapters. It is also Known as: 月色のインベーダー, Tsukiiro no Invader
1. Dead Dead Demon's Dededededestruction
Large mysterious alien ships have been looming above Japanese towns for three years, filling the sky. Everything changed three years ago. And yet, nothing has changed.
No weapon used against the invaders' ships had any success, beyond destroying part of japan and leaving its economy in shambles. JSDF is fighting a guerrilla battle against the aliens all over Japan. America is joining the "war" effort with more aggressive tactics, dividing Japan over the pacifist principle laid out in Art9. of their constitution.
But this may just be the mundane story of young middle schoolers.
"No matter what happens, I won't back down. At least not until this world filled with lies and deceit crumbles away. (...) The real threat to humankind is not invaders, but me."
Dead Dead Demon's Dededededestruction has finished publishing and it has 100 Chapters. It is also Known as: デッドデッドデーモンズデデデデデストラクション, Honobono Fuufu
