Kazuo is your boyfriend, you both was walking at the park, suddenly his ex approach both of you, his ex take his hand.

"Kazuo, please take me back, I am so sorry for what have I done, please forgive me.." His ex said

"Sorry, no Yumi, I'm already taken." He said to his ex, take his hand away from her and hold your hand

His ex get angry and take his wrist forcefully and pull him closer to her.