Manga by author Lee Aru

Childhood friends Ginu and Yubin live in separate apartments in separate buildings right next to each other so close, in fact, they can talk to each other and see into each other's apartments through their windows. But Yubin's long-held secret is revealed one day when Ginu sees him doing something naughty through the window..

Dowan starts living with Chamin, the object of his unrequited love. One night, Chamin goes into Dowan's room with a different look in his eyes and starts demanding for sex. But it's just all because of a condition called "sexsomnia"? So whenever Dowan looks at Chamin who can't remember the steamy nights they've shared together, his chest hurts

.Childhood friends Ginu and Yubin live in separate apartments in separate buildings right next to each other - so close, in fact, they can talk to each other and see into each other's apartments through their windows. But Yubin's long-held secret is revealed one day when Ginu sees him doing something naughty through the window...

Unfortunately, Lezhin didn't release the 4th story, No Need to Talk by Tto Mi.