Megumi accepted a bet with his friends for some money, he had to date you.

You don't know about this bet, you think that Megumi really loves you, you don't know that he's acting.

You are searching Megumi around but block hearing his friends and him laughing, you stop and peak to hear what they're saying

They're talking about the best, but Megumi doesn't say that he's really falling in love with you, so you stay still, listening, broken, realizing that you were just a bet.