The Mysterious Tennis Coach is the Rival of Love - S1.E9

Mrs. Ichinose decides that Kyoko's been much to glum lately with worrying about Godai's confession and her always looming regret over Soichiro's death, so she signs them both up for tennis lessons. The neighbors confide that the tennis coach is someone they'd have no problem leaving their husbands for. The tennis coach, Shun Mitaka, upon meeting Kyoko instantly becomes enamoured with her, and little does Kyoko know, but Mitaka will become the man she'll come to depend on quite a bit over the next few years, and after Godai's recent antics, she has no problem accepting his friendly overtones.