In essence, Umimi's grandmother dies. But more importantly, her biological mother is dragging her back, to her house and that abusive new husband of hers that has designs on Umimi's body. It was rough MTL, but the gist of it is, the mother forces the closure of Grandma's apartment, has the locks changed. And she basically tells Umimi, I'm taking you back because he'll leave me if I don't - so for once, I'm going to care about my happiness. Umimi drags her feet and proclaims "Do you know what he does to me?" And then the MC steps in. Bottom-line, if there is EVER A TIME for the MC to NOT be a beta cuck and simp, IT IS NOW. The question is - will he? I have my doubts given how this Mangaka has been threading this plot. My SWAG - he'll get on his knees and beg the mother to let her be - maybe to take her with him. HIs Mom seemed pretty cool about Umimi, so maybe. God knows this series could use ONE SHINING MOMENT OF REDEMPTION, for anyone but especially Riku.