Spin the bottle minigame
From Summertime Saga Wiki
This party minigame is unlocked in Roxxy route and provides different scenes depending on the outcome. In the first sessions, the player spins the bottle, and must kiss the person to whom the bottle points when it stops spinning. After a few games, the reward goes up to a sex scene in the changing room. If the bottle points the Main Character, then everyone is invited to the fun!
You can use Ctrl to reset the spin.