Ah, in the end, Reimu is right, the real Kasen is a good Kasen.
Also I hope that ZUN-sama will release another manga about the relationship between Kasen and Reimu after this manga has ended. I know he said "will", not "going to", but still I just want to believe.
Is there a special meaning when Kasen gave Reimu some rice dumplings? On the page 2 from last, Reimu looked surprised when she received the rice dumplings. This is what I mean :