Boku wa Ayashii Kimi no Mono
Boku wa Ayashii Kimi no Mono is a Manga/Manhwa/Manhua in (English/Raw) language, SUGGESTIVE
series, english chapters have been translated and you can read them here. You are reading chapters on https://mangabtt.com fastest updating comic site. The Summary is
Shou-chan is a member of the public morals committee who wants everyone to have a healthy relationship, and is worried about his childhood friend Sayo. Because she carries the blood of a succubus, she often approaches her beloved her Shou-chan in any way to make him "lovey-dovey sex". As he persists in having a healthy relationship, which is full of lust and surrounded by questionable students, will Shou-chan manage to keep his sanity?