I'm glad Shiraishi and Asirpa/Sugimoto are technically good friends: you don't moon each other out of the blue unless there's a certain level of trust.
I feel bad for Tsukishima. He has absolutely no escape from loonies. He could die and we'd still see that helplessly fed up face looking on the antics.
Welp, he already deduced the nature of the mysterious geta-man from those anecdotes... this manga's full of monsters. That and the first half of this chapter is the core of Golden Kamuy.