Nashiko Jippensha's mother forces her to leave the house after she's told to be quieter, prompting Nashiko to look for a new place to spend time with her friends. Her father's old mahjong parlor, which had been closed, becomes a suitable spot. While cleaning the parlor, Nashiko encounters a bird who claims to be a mahjong spirit, and they start playing the game together. The experience brings Nashiko and her friends closer as they continue to play and enjoy the space.