A recap for the people shitting on the MC.
He was confessed to when he was in middle school.
Thinking he was going to get a Girlfriend, he went 2 towns over to meet the Girl (The Gyaru).
He was stood up, he ended up spending the night in a park under a blizzard and almost died from Pneumonia.
After the first time it happened, it happened 2 more times, so he was forced to change schools.
Thats the source of his trauma, thats why he doesnt approach women.
More info
The Gyaru is a bit dumb, she was fooled into thinking that what she did, was a confession spell that would make them be together forever.
The Aunt is super distraught and feels guilty about the whole thing, because she encouraged him to go out and meet the girl, thats why she goes to such lenghts in taking care of him, and paying for 2 of his cellphones.