Push Off

Hun-Gi, the protagonist, lives a jungle-like school life and is treated like cold rice at home, so he is always teased and ignored wherever he goes. He has no presence, no confidence, no interest in sports, and is an ordinary high school student. One day, Hun-Gi tries to confess to the girl he likes, but he realizes how worthless he is and falls into deep despair. Then, by chance, he gets a skateboard and it talks to the protagonist who is lost in sorrow. The board, which has a personality opposite to the protagonist's, stimulates the protagonist and he starts to do whatever it tells him. As a result, he gains unexpected things, and the protagonist's personality gradually changes.

(Source: Ridibooks, translated)