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Four slice-of-life omnibus stories. The Rain and a Cat, Soda Ice Cream from the Convenience Store One Sunday, Reki, Langa, and Miya head out to the skatepark as usual when a squall suddenly hits them. They head back to Reki's place and start playing Karuta, a Japanese card game they find!? Becoming Really Serious About Things In the past, Sakurayashiki and Nanjo had spent their high school days in relative obscurity. These two always had butt heads and competed, but what lies ahead for them from all this competition? Morning Routine This story unravels the mystery surrounding Ainosuke and Kikuchi's everyday life. It closes in on their secret moments, crossovers, and a moment beyond that draws closer. Hiromi, Do Your Best! Shadow is an anti-hero at night, but this is his three-part slice-of-life flash story highlighting his noble and kind personality as he works hard at a flower shop during the day.

High school student Reki Kyan is passionate about one thing: skateboarding. When night falls, he heads to "S," an illegal underground race inside a mine where skaters compete in highly dangerous situations. After a loss that results in his skateboard being destroyed and his arm being broken, Reki is now incapable of practicing at all. While working, Reki runs into his new classmate, Langa Hasegawa, a half-Canadian and half-Japanese boy with no skateboarding experience whatsoever. Langa is in desperate need of money. After they both visit "S" when tasked by Reki's boss, they get into trouble and are forced into a bet that requires Langa to skate in a race. However, the mysterious transfer student holds a trump card that Reki is unaware of, one which might help him win the race in the most unexpected way. [Written by MAL Rewrite]