[Kawaraya Honpo (Kawaraya A-ta)] Onee-chan Assemble!! (Fate/Grand Order)

Jeanne Alter drags her pouting Jeanne d'Arc counterpart — glasses askew, ponytail swaying — into a decadent "Onee-chan Assemble" league where busty older sisters compete to overwhelm each other with their colossal erections and overflowing pussies. The bespectacled saint teases that Alter's cock is already leaking precum from foreplay alone, then buries it deep between Alter's plush breasts while demanding to be called "Onee-chan," her lewd grin framed by a retsudou collar and chains. Alter retaliates by pinning Jeanne down, thrusting her own veiny shaft against Jeanne's trembling slit and slick thighs, whispering that she'll "punish the depths of Onee-chan's pussy with her hot penis milk" — and Jeanne cums hard, face twisted in humiliated bliss. The affair shifts when the swimsuit-clad Berserker Alter looms over her trembling sister, warning, "If you want a taste of my top-tier pussy, go ahead and put it in," her towering shadow-lancer cock pressing demandingly between Jeanne's gasping lips. Jeanne weeps and drools, confessing she can't get enough of the way Alter threatens her, while the aftermath text from Kawaraya A-ta reveals Jeanne and Alter's rivalry as an "Ereshkigal versus Ishtar" continuation, with Rider/Annia-chan's opening shadow-lancer scene also slated to draw the league into a messy alliance.