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Np. I have strange and mostly useless power to figure out how to get out of locks and bugged events in visual novels lol

So what worked for me (I had the same issue) letting it loop to Monday, and buying the dress after the class, and then doing the scene with Asuka at night giving her the dress. This put the mission back on track and I was able to continue

Small edit, I can confirm this works, as I went on to the next monday and it no longer looped. Hopefully it works on your end