The Rock the School plan
Sam arrives in Agefield shortly before graduation and meets Kale, who wants to leave school as a legend. Axel is already involved, and Sam becomes the missing member of their Rock the School plan.
That plan is the confirmed story spine. The official materials do not disclose the names, order, or objectives of all 32 missions, so this hub uses a spoiler boundary until the game can be played and checked.
Main story versus side activities
Main missions drive the coming-of-age story, while 15 optional missions or activities occupy the school and town. Good grades can earn money, and skipping class can create time for side work.
The useful launch-day structure will separate required story steps, optional activities, missable decisions, and rewards. It will not present promotional scenes as playable mission facts.
The two endings
The Steam description confirms two different endings and says an important choice arrives when prom finally comes. It does not say which decisions trigger each ending.
Until those conditions are tested, save before major late-game choices when possible. A future ending guide will show clear spoiler warnings and cite the tested branch point.
Confirmed: two endings. Unconfirmed: their names, requirements, and whether earlier choices affect them.