Basically, taehyun became a kid again so he can take care of hajin while hajin's in the middle of becoming a vampire. Baehyuk, hajin's ex crush suddenly became possessive of hajin because of certain events that happened to hajin, Baehyuk bacame violent to anyone who was talking or even staring at hajin, and Baehyuk manipulated hajin into trusting only him.Taehyun saw how depressed hajin became cause of Baehyuk's violence towards his classmates, and how no one wanted to be friends with hajin anymore. Taehyun and hajin fought, cause taehyun was trying to convince hajin to break up with Baehyuk, but since he manipulated hajin, he got mad with taehyun and told him "you don't know anything" they didn't talk for 6 months. Taehyun really wanted to help hajin get away from Baehyuk, but he needed to have hajin's trust again, so he talked to hajin again and told him he was also a vampire, they made up, but hajin was still with baehyuk. but when dohyun met hajin, that was the time hajin was finally free, that's why taehyun was greatful to dohyun.
I skipped a lot of events, but I still hope you get it(▰˘◡˘▰)
Ily, thank you~ <3
Awww you're welcome ε=ε=(ノ≧∇≦)ノ
Can some tell me what happened before?? I got lost with the flashbacks :/