How about this? :)
http://www.mangago.zone/read-manga/honto_yajuu/
http://www.mangago.zone/read-manga/kouun_no_rihatsushi/ not age gap but very fluffy and sweet
http://www.mangago.zone/read-manga/bukiyou_na_silent/ cute and fluffy school age
http://www.mangago.zone/read-manga/sweep/ age gap and fluffy not as long as the two you mentioned
http://www.mangago.zone/read-manga/rutta_to_kodama/ school life fluffiness in dorms
http://www.mangago.zone/read-manga/yume_musubi_koi_musubi/ age gap fluffiness uke is adorable
http://www.mangago.zone/read-manga/hachimitsu_darling/ super adorable age gap story
http://www.mangago.zone/read-manga/koi_ni_nare/ age gap that was a nice story
Ah, yes honto yajuu! So fluffy indeed :3
Rutta to kodama! It's one of my favorite
I'll check the other thank youu (≧∀≦)
You're welcome I hope you like them a few of my favorites
Yaoi manga with so much fluffiness like otokogokoro and katekyo? *big age difference will be a bonus, but no shota :3