Seme and uke were friends in school before seme started to get bullied and uke didn't stop it. Then they meet again by accident when seme moves into uke's old apartment and receives a package that the uke comes to pick up.
Guilty that he never stopped the bullying, uke agrees to sleep with seme once to make up for it. Then seme changes it to five more meet ups to earn his forgiveness. Uke agrees, and over multiple dates, they grow closer. But because of trauma from his last boyfriend, when seme asks if they can keep meeting up, uke reminds him it's only for five dates.
Then uke realizes he's in love wih the seme, and he plans to confess on their last date, but he keeps failing. Then he still hasn't worked up the courage when he drops seme off at his front door. Thinking the uke is going to walk away again, it flips seme's switch, and he's mean and tells the uke he never liked him, which triggers uke because of his past relationship.
Then there's a lot of sex where uke is confused about what exactly the seme wants from him because he confesses that he wanted him even back in high school, but uke is caught up on how the seme said he didn't like the uke. And the seme tells the uke he's not letting him go again.
In chapter 28, seme says to uke “How did you ever think you could live without me? I’ve regretted it ever since graduation. I shouldn’t have just let you go back then… Had I not, you would have been mine much sooner. I can’t believe I wasted so much time…”
And then later, seme tells uke, “I couldn’t stop thinking about you… Not one day has gone by where you weren’t on my mind.”
And then at the end of the chapter, seme says to uke, “Let’s be together.”

I'm so confused what TF is happening? Can someone give me a short summary