My Only 1

Be careful what you wish for. Yu Haneul learns this the hard way when she makes a new year's wish for her next love to be her last after being sick of all her failed marriage blind dates. This earns her the ability to see a magic number on people's bodies, with "1" engraved on her own. She soon figures out that the number has something to do with how many relationships a person has left in their life. In other words, Haneul truly only has one remaining chance at love, just as she wished. That's when she meets Jeon Haelim, who seems like the perfect guy except for two things. Not only is Haelim a much younger college student, but his number happens to be "99"...

(Source: Tappytoon)