Hinatazaka46 has released a fan call/chant guide video for "Surf's up girl" on their Hinatazaka Channel, featuring 4th Gen members ahead of the 7th Hinatansai 🩵☀️ �youtu.be/vr7IROT1ml4sb #日向坂46 #日向坂四期生 #日向坂46_Surfsupgirl #七回目のひな誕祭