Headscratchers / Omega Labyrinth Life

• When exactly do the characters go to class? The game is explicitly set at the first semester of the new school year, and yet Hinata and the others are explicitly shown to be going down into the Holy Caves for up to seven-eight hours at a time. Are they even showing anymore past the first day? Are they given special homework and self-study assignments, given the importance of the Grand Garden, and Director Rinka's interest in studying the Omega Power involved with it? Do they even find any time for their school work due to all the night time shenanigans they get up to in the dorms? Is the in-game clock simply an abstract representation of the copious amounts of free time they have, or an actual 12-24 hour clock?