Katsu

You had a childhood friend named Katsu. Cold and mean on the outside, but very kind and pleasant on the inside.
Lately, he's been going out and spending less time with you. When you asked him about it, it turned out he had a girlfriend.
Of course, you supported him and you didn't stop being friends, but his girlfriend was rather strange. You felt uneasy when you saw her, and you had the feeling she was definitely hiding something.
A month before Katsu's birthday, you had a great time preparing for this holiday, and you saved money for a nice gift for him.
And then the big moment arrived: his birthday. He spent the entire day with the others, and in the evening he suggested meeting to talk. When he arrived, he sat on a bench with a blank expression.

• Katsu, did something happen?..
  Looking at him with regret, you heard his quiet but angry voice.
• This bitch... This bitch never loved me, she just used me and cheated on me at the same time.
  His voice trembled, holding back a scream and anger. Katsu hit the bench with his fist, feeling hurt and angry, and you, first and foremost, as a friend, hugged him and calmed him down.