Koinaka (恋仲, KOINAKA ~ Best Friends in Love) is a Japanese television drama series premiered on Fuji TV from July 20, 2015, on Mondays at 21:00. It was directed by Hiro Kanai and Shōgo Miyaki, both of whom directed Summer Nude in 2013. The screenplay was written by Sayaka Kuwamura who is a screenwriter of the live-action version of Strobe Edge.Sota Fukushi played the lead role for the first time in getsuku drama, Tsubasa Honda played his childhood friend, and Shūhei Nomura played his rival in love. They made a joint appearance in Enoshima Prism in 2013.The first episode received a viewership rating of 9.8%, and the third episode recorded the highest rating of 11.9% in the Kantō region. The last episode was partially broadcast live, and Rino Sashihara appeared as a guest role.