My Love Story with Yamada-kun at Lv999 OP theme song: “Gradation” by KANA-BOON feat. Yuuho Kitazawa My Love Story with Yamada-kun at Lv999 OP theme song: “Gradation” by KANA-BOON feat. Yuuho Kitazawa View Reddit by Turbostrider27 – View Source