1LDK no Blues

Having lived with her boyfriend for a few years now, she's fed up with his haphazardness and arrogance. One day, she couldn't take it anymore and said, "I'm leaving! I'm breaking up with you!"

When a couple in a rut comes to a crossroads in their lives, will they choose "marriage" or "breakup"?

(Source: Sukima.me, translated)