Deodeodeo! Jjinhage Aneun Sai

Soo-Yeon’s dating life is non-existent when her cheating ex shows up with wedding invitations and his to-be wife. However, when she’s taunted for being single because she won’t let a guy go past first base with her, she impulsively lies that she’s dating the hottest guy nearby: Ji-Hyeok. Fortunately, Ji-Hyeok plays along and pretends to be her boyfriend, and Soo-Yeon’s pride survives the encounter. However, things take a wild turn when she ends up at Ji-Hyeok’s place and goes all the way with him, kickstarting a bond that goes beyond everything she ever dreamed of.
(Source: Tappytoon)
Note: Chapter count includes five side story chapters.