
Prediction of what's going to happen in my opinion:
Jooin will start going out with Cain but his heart and his mind will always think about Yahwi. Since Cain is a good guy, he will let Jooin be free and they will break up. At the same time Yahwi will feel so sorry for his past behavior, he will promise to treat him well from then on and in the end Jooin and Yahwi will be together ( ̄∇ ̄")

People complaining about incest... Did you even read the warnings and tags? It's clearly written that is incest.
If you are uncomfortable with it (which is legit) just don't read this manga... On the other hand, if you continue to read this despite knowing it's incest then don't complain in the comments.
Is it too difficult for you to understand this? #-.-)

This is the sequel if you want┗( T﹏T )┛
https://www.mangago.zone/read-manga/a_clumsy_adult_and_a_nasty_boyfriend_shingeki_no_kyojin_dj/
LMAOOOO!! I SWEAR I REALLY CAN'T WITH THESE GUYS ε=ε=(ノ≧∇≦)ノ