Congrats on releasing this Alpha build! Before I give my review, it bears mentioning: You've spelled the title as "Before the Strom" on this page and in the URL. If this is a typo (I'm assuming it is) it will make it much harder for people to find your VN.
Anyway, I guess I'll start with things that are likely to change soon anyway. There's currently no music which made it kind of awkward, and Brooke's sprites could use more expressions. However, Kai and Dad's sprites look very good so far! The art style is very appealing and cute.
Since there hasn't been much to the plot so far, I can't offer much criticism there. My main issue at this point is that a lot of the writing felt overly heavy on descriptions. A lot of thoughts that were expressed using five sentences really could have been written in just one. I'd recommend having more of a focus on dialogue and character-building moments, especially considering this is the first build. One of the first things a story should do is set up the characters so we can get a sense of their personalities and feel compelled to read on to find out what happens to them. I can't say I know much about the characters after reading this build.
Another thing that I noticed was that there were many typos throughout the English script. Most of the mistakes weren't major (subject-verb agreement, awkward word choices, misplaced commas, etc.) but they were very frequent, occurring in almost every other sentence. It was still perfectly readable, but fixing these issues would make for a nicer, more polished reading experience. If you want/need an editor, I would be happy to help you with that.
That about sums up my thoughts so far. Sorry if I came across as overly critical, and good luck on releasing the next build!