Alright then, time to plan out my 4th day (wow, the others really need to catch up)
I'll keep my morning and afternoon the same (on filler schooldays, just assume that I'm going to go to school and the kendo club unless I say otherwise (which I doubt I will)). What I will do is have Mike stay after a little bit to show Keiichi his new skill (since Keiichi gave him some advice on how to do it, and his training is a huge part of why it was even possible, Mike would feel like he owes him at least that much). Once he gets back home, he'll use his Divination book. After that, he'll work on grinding the Spirit Blade skill
Also, fun little thing that I noticed; except for VIT, all of Mike's stats end with 3 (however, if you add up the individual numbers (2 and 1) the sum is three...so...make of that what you will)