Yandere Attack
I really like the story of someone who clearly realizes that he is doing the wrong thing and will inevitably make the relationship between the two people go further and further away, but because of his illness, he makes a decision that is contrary to his will in reality.
In the process of walking towards each other, they kept making mistakes, constantly trying to make amends, constantly blaming themselves and regretting, but they had to fall into the next round of mutual torture.
Purpose: Although we made many mistakes on the way to each other's lives, fortunately, our ending was not too bad because of this.