Suzuka and miho are such good friends to the lead characters, they have made this story much better. It is great that we are back on the Natsumi hype, lets see how next chapters date goes. Natsumi is still too shy to confess and Sunao doesn't think she likes him yet either. I imagine nothing will happen but maybe they will get a better idea of each others feelings.
Best thing that can happen with no drama: Natsumi or Sunao confess on a non-swap day.
Best thing that can happen with drama: Natsumi confides in Lemon (Sunao) on a swap day that she likes Sunao but is too shy to tell him because "I don't think he sees me that way". Then Sunao can confidently confess to Natsumi but has to tell Lemon first.
(edit: correcting this one)
Most normal thing that can happen (which of course causes drama): Natsumi confides in Lemon
(Sunao) on a swap day on a non-swap day that she likes Sunao but is too shy to tell him because "I don't think he sees me that way". Breaks Lemon's heart and she either tears up in front of her or runs off to cry. (Eat karma, bitch.)
Worst thing that can happen (causes drama): Natsumi confesses to Sunao (Lemon) on a swap day and a shocked Lemon blurts out something that can be taken as a rejection (like "No! No, no, no! Please no!") and runs off.