Jinsung, who has had a crush on his older hyung, Yura, since childhood, comes to live with him due to a sudden parental accident. However, Jinsung is now trying to give up his heart and feelings since he doesn't want to upset his hyung and draws a line whenever he approaches him. One morning, he witnesses his hyung sneak in and masturbate with his sleeping self "Hyung... Is this really the hyung I know? ...Who are you?!"

Resource links:
https://www.lezhin.com/ko/comic/doubletrap