Leaper

Leapers—individuals who were born on February 29th that age at a rate four timese slower than that of a normal person and can live for over 300 years. Mio Aono is one of these leapers and like many, experiences all the emotions that come with living beyond the normal, mortal lifespan. From Isaki Uta, the creator of "Mine-Kun is Asexual", comes a one-shot series that won an honorable mention in the Monthly Afternoon Magazine Manga Competition and jumpstarted Isaki Uta's career!

(Source: Irodori Aqua)