Hiyo & Vivid!

Hiyo, a straight-faced high school student who isn't good at showing her feelings, adores Ayamorin, an expressive idol wutuber loved by everyone. One day, Ayamorin transfers to Hiyo's school... and they're seated next to eachother, and their houses are next door. The curtain rises on a sparkling school life that exceeds Hiyo's capacity...!? (Source: Niconico, translated)