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Itsuka Uchuu kara
いつか宇宙から · いつか そら から
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Nakagawa Yuki, a popular boy at school, lives a fulfilling life, always assuring his friends Shinichi and Midori that he is happy. However, on his 17th birthday, his father tells him, "You're an alien," and he discovers that he has awakened to the ability to transform into other people. Then, by chance, Shinichi and Midori see Yuki transformed into a girl, and Shinichi falls in love with him at first sight... (Source: Natalie, translated)
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections
Volumes
ゲッサン少年サンデーコミックススペシャル First edition
1vols · 2026-05
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Kyō Kara Ore Wa!!
今日から俺は!!
1990 · 西森博之 · 99vols · Shōnen
ActionComedySlapstickDelinquentsSchool
Cheeky Angel
天使な小生意気
1999 · 西森博之 · 30vols · Shōnen
Gender BenderComedyRom-ComSchoolRomance
道士郎でござる
2004 · 西森博之 · 12vols · Shōnen
Ochanigosu.
お茶にごす。
2007 · 西森博之 · 11vols · Shōnen
ComedyDelinquentsSchool
Koutetsu no Hanappashira
鋼鉄の華っ柱
西森博之 · 9vols · Shōnen
ComedyDramaSchoolRomance
Hiiragi-sama wa Jibun wo Sagashiteiru
柊様は自分を探している。
2016 · 西森博之 · 8vols · Shōnen
ComedyMysterySlice of Life
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Shojo Null
少女Null.
2023 · 中西鼎, あきま · 3vols · Shōnen
Sci-FiGoreDramaMechaWar
Rai Rai Rai
雷雷雷
2023 · ヨシアキ · 6vols · Shōnen
Sci-FiActionComedy
Thunder 3
サンダー3
2023 · 池田祐輝 · 5vols · Shōnen
Sci-FiActionAdventureDramaFantasy
Erio to Denki Ningyou
エリオと電気人形
2023 · 島崎無印, 黒イ森 · 5vols · Seinen
Sci-FiAdventurePost-ApocalypticMechaCrossdressing
Cosmos
COSMOS
2023 · 田村隆平 · 9vols · Shōnen
Sci-FiActionComedyDramaSchool
Boku ga Koisuru Cosmic Star
僕が恋するコズミックスター.
2023 · 縁山 · 4vols
Sci-FiComedyRomancePsychic Powers