I know you guys will probably think it's another pyscho story (just like Obey Me ; Killing Stalking ; or shits like that) but NO. Just because of the leash and captive thing, doesn't make it like that. Y'all probably didn't read the whole story.
SPOILER: If you don't want to be spoiled pls ignore
May was the one who actually suggested to be a replacement for that cat and even put that collar on his own neck when the cat died. Jooin, growing up, probably stayed with that fact that May is still welcoming with that idea, and did that to May upon captivating him by force. I also understand that May didn't know at first, bcs, hell that was a long time ago! I know it's crazy. I hate that as well, but, we also have to understand their story. They had a past, they're both messed up, and I'm happy to know they found each other. And I hope having each other, can inspire both of them to do something new. I hope May will found inspiration to either finish his studies or look for a job and Jooin to be less possessive (I guess), I hope also he apologizes to Youngjin and even Pyoin for wiretapping and digging to their personal infos. Also I hope he'll apologize to May for captivating him and admit his own mistakes. Now that love each other, I hope Jooin can help May to be successful as well and I just know, he's such a supportive boyfriend bcs he loves May so much.
HAAHHAHSHSS KAYA PALA SA UNA SABI WE HAVE TO BACKTRACK A FEW YEARS. KINGINA NAG FLASHBACK NG PUNONG PUNO NG SEX SCENES. Grabeng flashback yarn???(/ω\)