Too Close but the author has lots of tsundere bls!
http://www.mangago.zone/read-manga/yakimochi_wa_kitsuneiro/
http://www.mangago.zone/read-manga/datte_maou_sama_wa_kare_ga_kirai/
http://www.mangago.zone/read-manga/karasugaoka_don_t_be_shy/
http://www.mangago.zone/read-manga/holding_room/
http://www.mangago.zone/read-manga/tabetemo_oishiku_arimasen/
http://www.mangago.zone/read-manga/senpai_danjite_koidewa/
http://www.mangago.zone/read-manga/konna_nichijou/
http://www.mangago.zone/read-manga/hidoku_shinaide/
http://www.mangago.zone/read-manga/chiya_s_just_an_unstable_guy/
http://www.mangago.zone/read-manga/amanojaku_ni_koishite/
give me some tsundere bl, please :))