Honestly wtf is happening I AM SO CONFUSED

So I bought the chapters that were missing and here’s my basic summary (spoiler alert)
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SETUP: White hair kid confessed to black haired kid and the whole school found out. Black haired kid made a wish (unknown but presumably sth like “I wish this had never happened”) and was transported to an alternate reality. In this alternate reality, the he had confessed to the white haired kid and basically the reverse situation had happened. Because of the harsh bullying his alternate self attempted to kill himself and made some sort of wish that combined with the original self’s wish which is why he was transported. In the new world, not only does white haired kid not like him back, but he no longer is friends with blue haired kid, his mom is dead, and his brother is abroad doing research on time travel.

IMMEDIATE AFTERMATH: Black haired kid confronts white haired kid and finds out it was actually orange haired kid who is responsible for starting the gossip about him being gay. Blue haired kid, black haired kid, and white haired kid all confront him and white haired kid starts being nicer to black haired kid. Blue haired kid also becomes his friend again. Girl character is initially jealous of white haired kid getting close to black haired kid because she likes white haired kid, but changes her mind when black haired kid saves her from her brother. Her brother is gay and left their abusive household which is why she has prejudice against gay people. They set up a conversation where this is resolved. Her brother also knows black haired kid’s brother and informs him that his brother just died.

TRIP BACK TO ORIGINAL WORLD: Upon hearing of the death of his brother, black haired kid attempts to return to his original world by overdosing. While doing this he meets a man in a strange mask. In his original world, he is stuck repeating the day that everyone found out white hair kid liked him. Eventually, while trying to fix it, he is caught by a girl who is part of some kind of time police force. She explains that the event must happen and that it will happen even if the black haired kid has to die. She also explains that the white haired kid is destined to die (presumably in every timeline???) and that in this timeline he will kill himself in 3 years. Mask guy then shows up and sends black haired kid back to the alternate world, explaining that he miscalculated. Mask guy now realizes that the original world can’t be fixed and black haired kid will have to save white haired kid in the new reality. He also explains that black haired kid’s brother is actually still alive.

IN ALTERNATE WORLD AGAIN: Now it becomes somewhat slice of life-y. All of the chapters since this point are pretty much just the 2 MCs bonding. White hair boy is clearly falling for black hair boy and experiencing jealousy about his friendship with blue haired boy. Orange hair boy wishes to regain his friendship with white hair boy, and blue hair boy has deep seated family trauma. (It is implied that his parents are neglectful and hired a tutor to watch him when he was little who either sexually abused him or slept with his dad)