Edit: New chapter. Yay. Thank you sensei.
people need to realize that Toono already rejected Kashima back in volume 3. He kissed Kashima in chapter 32 (his heart saying “want” which is something he doesn’t use often or at all probably until chapter 31 and 32 which is probably because of what happened between them in chapter 19) but apologized to Kashima afterwards only for Kashima not only kiss him back, and says his reason behind his Kiss(I like you) but does not ask or questions Toono’s reason behind his actions (his kiss) which leaves their relationship out to be questioned or in the unknown. Toono and Yacchan kissed in chapter 31 but because Yacchan asked him too. But even with that kiss you still see the difference between the two. With Yacchan Toono stated that he didn’t know what to do and it was embarrassing when it comes to Yacchan. However with Kashima, he was able to kiss him which shows the contrast between the two relationships.
This kind of thing happened with Jimmy and Yuri too so this thing isn’t new in YBB when it comes to dating and relationships. We know why Toono only invited Kashima only. Because Kashima was the only one that knew what happened with him and his parents. It shows that in chapter 31. Could he have invited Yacchan? Maybe. But usually Kashima is the one that is available most of the time where Yacchan usually is busy. Kashima also has to deal with his rival Yacchan who he cares about greatly despite what his cousin said to him in chapter 17 and 23 which seem to change his personality from volume 1 to vol 4 when it came to Toono. They already kissed more then once and they weren’t dating so why does chapter 32 change anything? They didn’t announce they were dating. Toono didn’t confess. Kashima is aware of that but still clings on a relationship that probably could never be. But unknown to Kashima, something has changed with Toono’s feelings. When Akemi and the gang talk to Kashima and Toono about their weekend at his parents home Toono immediately goes back to his old habits but stop himself because he kissed Kashima in chapter 32, questioning himself who was straight throughout the whole series. He even asked Shikatani if they should “have sex” But it get worse when Kashima tries to step in and say “nothing happen” which in return upset Toono. Because even though he didn’t want them to know about it, he didn’t want Kashima to think that their kiss didn’t mean anything which makes this situation complicated.
In chapter 34 if you noticed Toono is the only one that see that something is wrong with Kashima. Kashima told Toono that he gets depressed if he alone in volume 1. Yacchan doesn’t noticed, only Toono. Toono again sees Kashima by himself sitting outside and only Toono sees this and gets depressed and worried about him. Do I think it has something to do with chapter 33? Probably. I saw comments saying it was nothing, but we seen that look before in chapter 17.and only chapter 17 which the cover stands out from the rest of the series. I believe it will be up to Toono to talk to him about this but still has to deal with more problems that he and Kashima have.
Now Sensei has stated back in Volume 3 that things were going to get complicated once Yacchan falls in love with Toono and both confessing their love for him. It was foreshadowing for awhile now and it seems when Yacchan noticed Toono staring at Kashima in chapter 34 it was time to make his move. Sensei also stated that something is bloomed in chapter 32 which is obviously Toono falling in love with Kashima. We also know that Toono’s theme song Ikenai Love is start To bare fruit as well with him singing about falling in love with a guy but is struggling to deal with those feelings. But now with both feelings out, Toono needs to make a choice. However if you followed Sensei around 2015 and volume 1 and drama cd of YBB, you can pretty much guess the endgame here.
Sorry for my long explanation but I feel like I needed to point this out.