Warehouse
He was supposed to be uke http://www.mangago.me/read-manga/hi_manyuaru_ren_ai/
Wonho from Behind the scenes.
The therapist's story from Momentum.
Nah. Not the last one. Just mixed up, this one is a uke turning into a seme.
Renai-rubi no Tadashii Furikata. He was a seme in the previous relationship I believe. You can check a tag "seme turned uke" on baka updates.
https://www.mangaupdates.com/series.html?category=Seme+Turned+Uke
I've asked this once I will ask it again.
ARE THERE ANY SEME TURNED UKE MANGAS PLEASE