• Book Name: Onii-chan Lab. Manga
• Alternative(s): お兄ちゃんLab.; Oniichan Lab
• Genre(s): Comedy Drama Harem Romance School Life Shoujo
• Author(s): Tateno Makoto
• Status: Completed Download Manga
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Summary: Ikezawa Sumire's three elder brothers, Asagi, Ai, Kon are so beautiful even friends get jealous! Sumire too loves Asagi and Ai, but for some reason she just can't like Kon. That reason is...!? Adoptive siblings love.