Mukahi-kun to Aoi-kun

Mukahi Gou, at 11 years old, is over 170 cm in height.
His first confession ended without him ever hearing a reply, and ended in a mess.

Mukahi, with his tall height, struggles with the fact that he doesn't look his age. On one rainy day, he meets and falls in love with the high-schooler, Aoi.
While Mukahi's feelings grow stronger, due to his parents' sudden divorce, they can't even see each other anymore...

This is a lengthy side story depicting the encounter, reunion, and subsequent events of the main story from a different point of view.