It's "too fast" if you were expecting a series about the pursuit of a gay love or not. The way I see it, it's about Minato's decision on how to go about her life, and, as such, skipping the whole initial drama and moving on to the "torn between" drama is actually pretty good.
"Fast" was definitely not the word I should've used to describe this first chapter. And I do not mind a story without drama. In fact, I'd love it.
However, I think there's a lot is going on here for one chapter: was raised without a dad, now doing everything one can to support what left of family, try to meet others' expectation, have a bitchy boss, childhood friend propose to marry, indecisive and not knowing what to do, feeling frustrated of having no control of life, and now is drunk and a co-worker you do not know much about is sending you straight to a point of no return.
So I would say like my initial description: if I am the MC, this whole thing would feel like being hit by a truck.