The Light in a Genius's Eye Is All X

Always putting others before himself, Nariyuki at a festival is as busy as usual. He runs into and takes a stroll around all the food stalls with Uruka, helps with Rizu’s delivery, and accompanies an injured Mafuyu to Asumi’s father’s first-aid tent. On top of all that, he ends up running around all over trying to help a lost child...
In the end, Nariyuki is so busy being helpful that he misses his last train. But then Fumino, who has lost track of time gazing up at the stars, shows up. With no way to get home, the two are at a loss until they see the illumination of a hotel up ahead...