The protagonist sees his female childhood friend hugging his male childhood friend about the rooftop of school.
The guts with the protagonist then burns with uncontrollable jealousy. He feels himself betrayed by his female childhood friend, since she has finally noticed that he loves her a lot.
The protagonist then begins a revenge strategy, a revenge plan. He wants to hurt the girl, hurt her deeply. He'll do whatever that's required to hurt the woman and damage her in the same manner, or higher, that he is feeling damaged now.
