Gen Hoshino's music video for "Koi" has been viewed over 100 millions time on YouTube.
"Koi" was released on October 5, 2016. It is used as the opening theme song to the popular drama "Nigeru wa Haji da ga Yaku ni Tatsu", a show that he stars in. The show's popularity has helped steadily increase the song's popularity, while the music video's charm compelled people to continue re-watching it.
Music videos with 100 million views are rare in Japan due to limited access. "Koi" joins a short list that includes King Cream Soda's "Youkai Taisou Dai Ichi", AKB48's "Heavy Rotation", SEKAI NO OWARI's "RPG", Pico Taro's viral hit "PPAP" and Kyary Pamyu Pamyu's "PONPONPON".