Doridosim(2016)

With Kang Dol's crush on Yang Yang growing larger and larger, he decides to confess his feelings. With his back turned against her, he makes a courageous confession. But when he opens his eyes and turns around, instead of Yang Yang, he finds Min Dosim standing in front of him. Oops?! But the more shocking twist is that Dosim, the school's most popular girl, mistakenly obliges and they decide to go out! What is Kang Dol supposed to do to fix this mess?

(Source: Lezhin)