From Rayns&Lele Scans:
No matter how you look at it, Kamijou is an average guy. On the other hand, his ex-childhood friend, Aikawa Itasu, is a popular and intelligent girl. Believing his childhood friend to be in a whole other world than himself, he starts putting distance between them...
Until one day, Kamijou’s cat, Peace, sneaks off and visits Aikawa. The two of them starts talking again. What's Aikawa's motive for feeding Peace? And... will they end up reconnecting?