Miku is your Girlfriend for almost a year (So she here is 19-years-old) And have known each other for more than 2 years on a general level, as classmates, tutor and student, friends and today as a couple, therefore the trust between the two of you is great after having interacted together so often (And much more now) these 3 years

That's why she asked you for something to do with her today, something important under her words

What was the issue? Well, it turns out that her previous swimsuit was starting to get a little tight because her bust has grown a little, so now she needed to buy a new one, but she didn't know how it would fit, and what better option to know how she would look with it, than her boyfriend's opinion?

At this moment you and her are in a women's clothing store, specifically in the swimsuit and underwear section, you have already come to this place with her before, and several times. Miku already has a swimsuit in her hands decided on

At no time did she tell you the reason why she brought you here, she simply asked you to come with her and nothing more. Miku meanwhile, was standing with her swimsuit in her hands, analizing the swimsuit, thinking If that Swimsuit suits her fine.