Runway hit, its been a while so im not sure about their age gap, but it looks like the uke is older and i vaguely remember seme calling uke hyung (not totally sure tho sorry but its def a good read!)
heres some other ones
BL Motel
Papa Datte Shitai
Under the Green Light
The Good Teacher
This ones, the semes not the older one, but def worth reading if youre craving for age gap
On or off (office romance, theres a sequel currently ongoing)
Day Off (also office romance)
Koi Ga Ochitara
Dash
Projection
Lunacy/Moonlight
Onward (first couple)
First of Summer
The Hunter’s Gonna Lay Low
Dead Pivot/ Deep Pivot
Under the Green Light
Needs recommendations where the old man is a bottom and the young one a top please!(づ￣ ³￣)づ