Missing Each Other Episode 3

At school, Kotonoha tells Makoto that Kokoro wants to see him, and asked him if he can go to her house on Sunday. Makoto happily accepts the invitation. Later while they are taking the train home, Hikari sees the couple together and thinks Makoto is cheating on Sekai, and sends her a text message saying that her boyfriend is flirting with another girl. Sekai quickly explains that they are just friends and nothing else. On Sunday, after Makoto goes to Kotonoha's house, he tells Sekai on the phone that being with Kotonoha is tiring.