My Twilight

Akari Noyama, having no luck with her dream of becoming a manga artist, spends her days aimlessly. Now as she watches her best friend from her school days, Nagisa Umibe, become a successful mangaka, Akari tries to convince herself that she still has the "talent" to succeed… A coming-of-age story that depicts the strong emotions smoldering in the hearts of two young women, and the brilliance that lies beyond, with stunning brushstrokes.

(Source: Comic Action, translated)

Note: Also includes the one-shot Yoru no Kemono (夜のケモノ)