Ijiwaru Killer Tune

Komugi Shirai wakes up every day at 4.30 am, to help in her sister's bakery. At the same time, her neighbor Kirato, a seemingly philandering musician, often returns home... when Komugi goes to a club to watch her best friend's band's concert, the girl finds herself in front of Kirato's band.

(Source: Kodansha, translated)