I'm looking for yaoi stories where the seme looks like a stoic or calm guy, but when people try to take advantage of him, it turns out that he's super sexy and energetic in bed.
this one has a seme like that but not for long..
http://www.mangago.zone/read-manga/falling_alpha_enigma_the_fourth_bath/
Time skip! Time skip! Time skip!
Also, that logic - I have to hurry because anyone would love you, and anyone who loves you is a good person - is so cute!