Maybe I am asking a lot but can someone re-explain the story to me? The plot has potential...

Super confusing but the two guys were childhood (friends? Idk) or they knew each other from their childhood and the uke ‘saved’ him and the seme fell in love with him and they vowed to be married. Then the seme picks up the uke one day and invites him in his home and the uke is poor so it’s okay?? And they become ‘married’ idk and then the seme goes away for a year to study somewhere else and he comes back and that’s it

I see! I didn't think anyone would reply but thank you (づ￣ ³￣)づ

I will explain:
1. Rich-Boy (Kuon) was left by his family after he told them, if they wanted to die, they should die somewhere else (they were in debt and thought they couldn't escape it, so they did as he said and left). After that, Rich-Boy found petrol on his yard or something and became rich (yeah, don't question it).
2. Before he found the petrol, he was all alone and had nothing, especially no family anymore, so he cried out on the streets, where freshly orphened Punk-Boy (forgot his name) and his lil bro found him, then Punk-Boy told Rich-Boy he wasn't alone and if he really did feel lonely anyway, Punk-Boy would just become his family by marrying him, so all is well.
3. Punk-Boy is now older, can't remember any of that nonsense and has become a delinquent. Rich-Boy finds him anyway and wants to be with him, NOT stating that they have known each other before, but still kind of hinting on loving Punk-Boy for a while.
4. Then Punk-Boy finds out about Rich-Boys family-issues and is being told the story of how they primised to get married as children.
5. Punk-Boy starts falling in love with Rich-Boy, remembers how he promised to marry him back in the day, but Rich-Boy then needs to leave the country for a year because of his mega-company
6. Punk-Boy has now become more of an Obedient-Boy and Rich-Boy has turned into more of a Rich-Guy, when they meet again a year later.
7. After that they basically are together, graduate and become a happy (married) couple.

And if they didn't die, they are probably still alive - or whatever. (I actually don't know if you have that stupid line in Fairy Tales, too, I only know the Happily Ever After-line, but that's basically what they say in the german version.)

Very indepth! Thank you soo much ε=ε=(ノ≧∇≦)ノ

You're welcome