Any dark oneshot mangas ?
Yaoi or straight is fine ฅ'ω'ฅ
this has two chaps
https://www.mangago.zone/read-manga/name/
this has two chaps
https://www.mangago.zone/read-manga/name/
Something like Harada's works please ฅ'ω'ฅ
Maybe?
https://www.mangago.zone/read-manga/gesshoku_kitan/
https://www.mangago.zone/read-manga/aojiro_shohan/
Thanks!