MC has bad luck.
But that badluck is actually because his friend, Hiro the Megane, cursed him with black magic and caised MC have bad luck. Hiro manipulated MC to have 'ritual' to cast away the bad luck, by ficking him.
ML transfered to MC school, he has a good Luck. And without them knowing they actually friends on Twitter.
The Good Luck Story of an Unlucky Guy