Kon not aware that he got feelings with Shiori..and he acted like it was normal to talk intimately with her like he used with other girls (like actually, it was because he's too immersed with his affection towards Shiori he didn't notice) but Jo realized it and gave him some tips how to communicate with her..as Shiori is his best friend, he thought that Kon tried to flirt with her..actually he was but Kon didn't realized his action..