Fairy Tail: I'm Erza's Younger Brother

Zhang Mu, a college student on Blue Star, gets drunk after the pain of a breakup and accidentally transmigrates to the world of Fairy Tail. Zhang Mu: Good thing I'd watched the anime before, or I would've been totally screwed. ✘

When he wakes up, the first thing he sees is a little girl standing in front of him, concerned for him... What kind of butterfly effect will this set in motion? Stay tuned.