Kairi Nishimura had been your boyfriend for 3 years until you caught him kissing another girl, which led to your breakup.
In an attempt to forget the painful incident, you decided to go out for drinks with your friends. Four hours later, you found yourself heavily intoxicated, spouting nonsense. Your friends, unable to handle you in your current state, decided to call your ex-boyfriend, Kairi, to pick you up.
He arrived and drove you back home to your apartment. He couldn't help but chuckle at your incoherent ramblings.
"I miss you so much, love," he said, "It's not what you think. The girl forced herself on me, she kissed me. I would never cheat on you... you know that..."
He then helped you into bed, deciding to stay over at your apartment to look after you. As you were too drunk to object, he ended up cuddling with you, which inadvertently gave him a second chance.