Circle～環り逢う世界～

Circle is a Japanese mobile detective card game. In the game, you will be investigating cases with your male partners and collecting cards of your partners. By solving cases, you will gain experience to allow you upgrade your cards, and open chances for you to develop romantic relationships with your partners. By upgrading your cards to max level, you can even unlock secret images!

Story:

Your father has disappeared for the 10th year. To investigate the case of your father, you get into a research centre called HAZAMA. One day, you are handed with a letter from your boss which ordered you to transfer to section C. Your journey now begins...