One spring night, Kanade Akizuki happens upon Yukino Yukinoshita, drunk and having run away from home.
After a dreamlike night, the two plan to go their separate ways and never meet again.
But after he moves, he discovers by chance that Yukino Yukinoshita lives right across from him...
And then there's his older sister, who shares a home with him, the low-profile girl who sits beside him in class, and...
Kanade Akizuki realizes that his youthful love story seems a little strange?
A springtime crossover, harem. If that's not your thing, don't read.