This is High School Simulator 3D, a story-driven game in the same genre as High School Crush and School Days. The game takes place at the end of the summer, after the graduation ceremony, when the students are supposed to meet their teachers for the first time and get ready for the new academic year. However, instead of meeting the teachers, the students find that they're not all meeting their teachers at the school, but instead at the apartment of the principal. What happens next is up to you. You can choose to play as the student Sakurani or Kenichi, and depending on which character you choose, you'll have a different story to experience. The main objective of the game is to uncover the mysteries of the principal's apartment.