I thought so too... But at the same time, Tendou-senpai was going to say "Kazuomi you know Kadota truly loves you!"
Oh, and does anyone notice how even though Kazuomi's heat should have already ended, when Tendou-senpai, an Alpha, got close to him his heat started again? Again?! Isn't that evidence Tendou-senpai and Kazuomi could be Fated Mates? Seriously consider it. In the Omegaverse when an Omega and Alpha meet who are fated pairs the Omega will go into heat. In the story so far, Kadota has not even once triggered Kazuomi to go into heat and the time that Kazuomi went into heat for the first time back in high school at the baseball club should not count because it still has not been specified if Kadota was the trigger for Kazuomi's first heat. Most likely it was puberty. In short, Tendou-senpai has proven to be a candidate of being Kazuomi's Fated Mate just as or even more than Kadota has.
Its obvious Tendou-senpai is in love with Kadota and Kadota likes Kazuomi, but who does Kazuomi actually have feelings for?