System: I Am Rushing to Do My Homework at the End of the Day

After his rebirth, Mu Jingyu discovered that he was just cannon fodder in the doomsday novel. And the protagonist is someone else. After rebirth, Mu Jingyu got a catch-up system. While others kill zombies, he does his homework. While others were grabbing supplies, he was rushing to do his homework. Don't let him lie down, he's still doing his homework. His homework is to brush up on proficiency, all kinds of proficiency. It's not enough to brush up on proficiency, you also have to brush up on the male protagonist's favorability. I would like to ask, how can I break the male protagonist's favorability level to 30? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.