help me find please ㅠㅠ

i need help finding a bl manhua that i read some time ago.
basically the main couple are office workers and already in an established relationship. one has blue hair and the other has pink hair. it isn't really a cohesive storyline, it's like those slice of life webtoons where you get random moments of the relationship.
to give even more context, the side couple is a brother of the blue hair guy (he also works at the company) and his love interest is the black hair boy with glasses that happens to be an intern at their company but on the side, he's a singer.