How to Use a Man's Necktie

Due to his father's debt, Park Woojin and Cha Taesung met as debtor and debt collector. After many twists and turns, the two gradually became romantically involved. They'd have a smooth-sailing relationship, even though Taesung could be a bit possessive. The only issue was that during sex, Woojin would have flashbacks of Taesung strangling him, causing Woojin to fall out of the moment. One day, a mysterious note along with a necktie arrived for Woojin... When he tries it on Taesung, Woojin witnesses its thrilling powers...!?

(Source: Lezhin Entertainment, translated)