Office worker (seme) x student (uke)
My rating: 6/10
It was ok. The uke was a bit too tsundere and the seme loved him before even meeting him, it wasn't really realistic. Also, the uke's mom and the seme's cousin annoyed me. The age gap is treated like it's nothing and it doesn't really seem completed.
STEP-BROTHERS, ONESHOT
After lying about his age and spending the night with a nine years older man, the uke meets him again as the son of his mother's new fiancee.
Shiawase No Housoku