Responses
there is the prequel for the third couple
http://www.mangago.zone/read-manga/yuuhi_ni_fureru_sono_mae_ni/
ehh. wait..
after reading back ur comment, i guess u've read the third one
IM SORRY OMG huhuhuhu
First couple, I really loved.
Second couple, honestly is messy which is a shame because I love Yone.
Third couple, I wish there's atleast there's some back story of them or anything that correlates to the original story before just randomly putting it in there but they're cute.