hmmm,,,how about this
http://www.mangago.zone/read-manga/saiyaku_wa_boku_o_suki_sugiru/
not so much first volume but definitely in the next two volumes... http://www.mangago.zone/read-manga/mujihi_na_otoko/
http://www.mangago.zone/read-manga/kami_sama_no_iutoori_moegi_yuu/
http://www.mangago.zone/read-manga/rutta_to_kodama/
http://www.mangago.zone/read-manga/oinarisama_no_honey_bunny/ plus its pretty cute
http://www.mangago.zone/read-manga/kawaii_akuma/ ok there's no fluff factor here although I think its hilarious but he does skulk around and protect him...from other people
http://www.mangago.zone/read-manga/keep_out_kisaragi_hirotaka/ oh super protective adorable puppy seme
Beast & Feast has a puppy/lion seme who's sexy as hell and protects him
http://www.mangago.zone/read-manga/senya_ichiya_romanesque/ persistent seme who protects him
http://www.mangago.zone/read-manga/toshishita_kareshi_no_renai_kanriguse/ protective but its against molesters
Oh and I think Yellow and Fake both have super protective semes
http://www.mangago.zone/read-manga/mezase_hero/ oh second seme especially....I don't remember if the first is or not...I was too busy being distracted by how much he semed like somebody from a humphry bogart movie...or like dirty harry.
http://www.mangago.zone/read-manga/aiso_tsukashi/ he's protective
http://www.mangago.zone/read-manga/mede_shireru_yoru_no_junjou/ also very protective
hello. I want to read a yaoi manga where the seme is very protective of his uke just like when seme saved uke from car accident, molesters, etc.. or even when seme will do everything for his uke even if it will cost his life