want a yaoi where seme basically turns into a beast that just gobbles up the uke like craz...

http://www.mangago.zone/read-manga/beautiful_beast/ +rest of Chiharu x Kazuki:
http://www.mangago.zone/home/mangalist/7543/

http://www.mangago.zone/read-manga/kokoro_kanda_neko/
http://www.mangago.zone/read-manga/honto_yajuu/
http://www.mangago.zone/read-manga/usagi_otoko_tora_otoko/ (kinda already a beast though)
http://www.mangago.zone/read-manga/hatsujou_animal/ (he's already kinda a beast though )
http://www.mangago.zone/read-manga/mujihi_na_otoko/ (this couple from the warui series)
http://www.mangago.zone/read-manga/ore_ni_koi_shite_dousunda/ (this one is one hiatus/potentially , but I feel like it fits the turning into a beast and devouring the uke)
http://www.mangago.zone/read-manga/datte_maou_sama_wa_kare_ga_kirai/