When Yuu's mother shows up and makes a commotion, Haruka's mother invites her in.  She drinks too much.  Meanwhile upstairs, Yuu is confronted by Karasu about being a wimp.  Yuu finds out that Karasu is him from the future but doesn't believe it since he knows nothing about him.  Later, Yuu and Haruka confront his mother about why her attitude toward him changed after his grandmother died.  This causes her to slip into another dimension - a memory dimension.  Now its up to Haruka to get her back.