Langit Kala Senja.

Langit harbors a love for his half-sister named Senja, but the mother does not give her blessing. Langit is a novelist while Senja is a junior editor at the publisher where Langit usually writes for publication. The publisher boss named Kala is obsessed with getting Langit's heart by using Kala as a tool to approach him. Kala was in a very difficult position to determine the answer between heart, career and rest.