They have completely different plots but in both cases music is a very important part of their lives. Both movies manage to include a lot of music in the movie without it seeming weird or out of place.
Similar story about how the band was formed, how they struggled to make it big, their relationships within the different characters, and their passion for music.
Apartment building manager by day and electronic music composer by night, Kiyosumi enjoys his "clean and simple" existence free from relationships and distractions. He only needs his music, or so he thinks. One day, he gets an unexpected admirer as a distressed female neighbor destroys both his room's window and his solitude...
Pontifex Rembrary, a character known for his divine powers, gets transported to a new world while fighting a devil. He possesses the body of Woo Yeon Woo, a member of an unpopular idol group, and helps turn the group's fortunes around after a disastrous live performance. With his charisma and divine powers, he becomes popular among fans but faces challenges from his past, contending with strange religious groups and the devil.