Jothea Alvandra doesn't like the new sub-professor who is in charge of their math subject, calculus. Well, she wasn't interested in the subject itself in the first place. She always came late and ruined everything for Professor Ismael Mondalla, but little did she know what would happen after they came up with an agreement, which would lead to a hugely chaotic life for them both. "What does love mean? I'll make you feel it the second time you attempt to slap me again."