Ep. 3: Keita y Kuro se unen contra el profesor Tsubota tras revelarse como agente de Tribal End

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Keita now has some new problems with Kuro, regarding the concept of Synchro, as he felt his entire life had changed after Kuro issued the Contract. It was until Keita, finding out that his teacher Tsubota is a covert Tribal End agent, realizes that Kuro was right all along, thus teaming up with her to defeat Tsubota, after he initially gains the upper hand against Kuro, due to issues of synchronizing properly with Keita. The two escape from school, leaving an unconscious Tsubota behind, after Kuro was able to incapacitate him through synchronization, allowing her Exceed abilities to be in effect against her opponent. (Source: Wikipedia)