Haruto Imai (今居 陽人 Imai Haruto) is a high school boy who is a classmate and close friend to Shōtarō Tatewaki. He is shown in the opening episode to have seen the dead cat, but was confused on how Shōtarō handled the situation instead of everyone else not doing anything. He is rarely seen, albeit in a few scenes, he is also in the tennis club with Yuriko Kōgami.

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