This is a simultaneous single release of seven theme and insert songs from the full-3DCG anime film "Ryoma! The Prince of Tennis," released in September 2021. All songs were written and composed by the original creator, Takeshi Konomi. As the original manga serialization heads toward its conclusion, interest in the film has been rising again after Konomi shared its connection to the film on his own X (formerly Twitter). This song is a duet between the protagonist, Ryoma Echizen, and the heroine, Sakuno Ryuzaki. It is a charming song built on the interplay and harmony between Ryoma, who cannot apologize honestly, and the shy Sakuno. *The content is the same as the CD included in the "Ryoma! The Prince of Tennis" Insert Song Single BOX [Limited Edition] released on September 10, 2021.