Watashi no Muchi na Watashi no Michi

Minato was living an ordinary but slightly suffocating kind of life. The one who changes all that for her is her senpai at work, Maya Asami. When Minato is left bewildered by her boyfriend of 20 years' proposal, Maya sets Minato's heart free. What will come of this peculiar love triangle? (Source: Kodansha, translated)