Responses
http://www.mangago.zone/read-manga/fushidara_na_hanatsumi_otoko/
http://www.mangago.zone/read-manga/how_much_i_like_you/
http://www.mangago.zone/read-manga/how_sweet_is_a_sugar_daddy/?av=1
In the second one, they have some difficulties later on, so doesn't stay cute alle the time, but most of it.
In the third one they have difficulties almost all the time, due to misunderstandings, but the still manage to be cute anyway (even so they seem to be at a turning point currently, but no spoilers)
cute but smutty yaoi?