It's probably because you're not hung over.

[He takes one step further up the stairs, so Hijikata can see his face clearly now. Souji smiles and drums his fingers against the edge of the floor.]

It will seem strange, but everything I just told you is true. I've been here for almost three years, you've been here twice and forgotten twice, and~

[He tilts his head back and thinks.]

Oooh, right, I have your poetry book. Bye~

[With that he turns and pads off down the stairs.]