Sseuregireul Wihayeo

Minjoo’s lonely. She keeps herself busy with social media, but that doesn’t help the fact that her husband’s distant and she’s virtually friendless. Nothing changes until she runs into Seo Jia, a handsome girl who’s just moved in downstairs. Minjoo’s never met anyone like Jia before, and can’t help but fall for Jia’s charms. But little does Minjoo know that their meeting wasn’t exactly serendipitious; in fact, every one of Jia's moves is carefully calculated...so that she can get her revenge!
(Source: Lezhin US)
Note: Includes six extra chapters