Big dogs > Small dogs
Surprisingly, the accidental peck on the cheek by Nozomu on Sou seems to have affected her as well.
Enter the imouto. The wild ride keeps getting wilder with his sister looking like she's got a mean brother complex with her. Also, the signs are there that Nozomu might be transferring into a local school. Goodbye, Tokyo!
I have a feeling Shiori will love this development even more. That is, if I'm reading her character correctly. She's an unapologetic and perverted sholicon wincest enjoyer