<Li> Gaku Yamamoto as Ryujo Suzuya, Kou's grandfather </Li> <Li> Toru Nakamura as Dr. Takahito Taneda, Mayu's father and Takuma's doctor </Li> <Li> Sea Kumada as the young Mayu Taneda </Li> <Li> Kaito Kobayashi as the young Takuma Kakunouchi . </Li>

Ost i give my first love to you