I think the only thing that's clear from the ending is that Kiwa is going to pursue Ririko and, as for Ririko, she doesn't seem too opposed as she keeps staring and blushing when she looks at cool-looking Kiwa.
Kiwa and Ririko never affirmed any feelings for each other in high school. We don't know whether Ririko really had any boyfriends while they had their heavily (purely?) sexual relationship, as Kiwa never looked at her phone or questioned her directly about it since she didn't want to become one of those girls. When they graduated, they both easily parted ways and didn't seek one another probably because neither pushed for anything more.
I think that this really is a bittersweet story and not to people's liking since neither girl fought for the love of the other unlike some of our other favorites. I find this pretty realistic in the sense that they were both very insecure as teens and probably still are as adults, actually.
last edited at Aug 9, 2013 8:52PM