Whelp...Starting to think Riri might have actually been the cause of Ooma's death in the past. I didn't want to believe it at first but that ending all but proves she's at least the one that FOUND the body but that facial expression on the last page doesn't seem like one that just found said body.
Interesting since we got this entire chapter from Riri's pov we did indeed prove she does remember her past (Though it was very obvious no one's gonna entertain and date a middle schooler like that if it wasn't for the past they shared).
Very interesting chapter that told us quite a bit without telling us almost anything at all.