IM SAD CAUSE I ALREADY FINISHED DAY 17 OF TAI
spoilers:
So i think, something is up with the ICECREAM, because Axel, You, and Tai got sick from the ICECREAM, and as you walk with Tai eating the ICECREAM, you both said "there's something off in the ICECREAM". So as you get to the hot springs with him, you both feel sick, as it shows a flash back of Axel as well.
So Mostly there is something going on, thats in the ICECREAM as its causing this.