Hiyo & Vivid!

Hiyo, a straight-faced high school student who is not good at showing her feelings, adores Ayamorin, an idol wutuber who is expressive and loved by everyone. One day, Ayamorin transferred to Hiyo's school, and the seats are next to each other, and the house is next door, and the curtain rises on a sparkling school life that exceeds Hiyo's capacity...!? (Source: Niconico, translated)