There seems to be a translation error in this chapter. Koharu doesn’t tell Kawasumi that Takane likes him, but is actually trying to pressure him into eating lunch with her by threatening to tell Takane that he has a crush on her. That’s why she says he won’t deny it. The scan attempts to convey that on a later page, but without the prior interaction is impossible to understand. Anyway, it’s a super important detail and the error interrupted that development.