https://www.mangago.me/read-manga/itsuka_koi_ni_naru_made/
https://www.mangago.me/read-manga/happy_end_wa_goisshoni/
https://www.mangago.me/read-manga/akai_ito_no_shikkou_yuuyo/
https://www.mangago.me/read-manga/hit_on_by_a_kinky_guy/ (at least not on the first chapters, skip to ch.30+ if u wanna see seme's shy persona, mf fr did a whole 360° change personality)
https://www.mangago.me/read-manga/focus_on_you/
shy seme recommendations pls