User blog comment:SPARTAN 119/Yuuji Kazami (Grisaia) VS Kasumi Route Shirou Yusa (Dies Irae)/@comment-36053634-20180829233607/@comment-379205-20180901231547

Uhh.... the character name is Shirou Yusa, the "Kasumi Route" refers to the female character that the player character Ren Fujii hooks up with in the route (though the events of the routes differ in far more aspects than just that), because, like most Japanese visual novels, Dies Irae shoehorns in "R-18" (if you catch my meaning) scenes, at least in the 18+ version.

Still, I will count your vote, I only brought this up as this has conjured up the amusing image of uber tsundere Kasumi "Bakasumi" Ayase fighting on even terms with Yuuji XD!