Due to something that happened when she was young,
Kanna ended up growing up to have difficulty dealing with men.

The only person she can truly open up to is her beautiful goddess-like friend named Natsume.

On the day of the sleepover party that Kanna was looking forward to...
Kanna is merry drinking alcohol she usually does not, when suddenly Natsume kisses her...

Kanna is bewildered by the sudden unexpected turn of events.
And Natsume's secret is revealed...

Natsume's heavy love slowly but surely crushes Kanna.