I finished this and this is literally my favorite thing now!! It’s so cute I recommend it! The second couple is probably my favorite too<333
There is basically no love triangle. Sangjae had a crush on Chorong’s sister(saw her one time), so he started paying attention to Chorong but in process had a crush on Chorong’s BF. Then he just sort of moved on knowing he doesn’t have a chance and then he met Chorong’s sister again, he is only character with open ending.
They finally communicating (≧∀≦)