Chara CC is a trainer game. After undergoing an operation, you get a special ability. Whenever you feel pleasure, you absorb CO2 from the atmosphere. Seeing all the damage caused by CO2, it's in everyone's best interest that you feel as much pleasure as possible. To ensure this goal, instead of getting a harem of professionals, you decide to become a teacher at the girls-only Chara Campus. Will you be able to sensitize the students to the catastrophe that is CO2? Will you get close enough to them so that they'll accept to do as much as possible to pleasure you to remove as much CO2 as possible?​