it was a extra past story about Mika (Asa-chan ex), Eri, Michiru when they were in highschool... so basically Mika is actually inlove with Michiru which is Eri's older twin brother and they got into a really bad fight with some guys and resulted with Michiru's death,,, both Mika and Eri are devastated but Mika never did moved on so he got really worse as time goes by.. but after he fought with mi-chan and asa-chan he realized something and finally decided to change and move on . . His dream about Michiru shows that he finally letting go of him and decided to be with Eri... and Eri is inlove with Mika since they were in highschool so he waited like 10 years for Mika╥﹏╥ ahh im so glad they ended up together and got married <3
Can someone please explain the last story? I’m confused