>>3015778>>3015776>>3015774While it's part of a rather infamous guro doujin, the context of the sad Yukari pic is this:
Yukari is invited by a group of boys to an afterschool tank club with the incentive of putting together a high-end tank model. The club, however, is a ruse devised by the boys to lure Yukari to a private place so they can gang-rape her. When she keeps coming back (expecting that one day they'll eventually start discussing tanks), they eventually get fed up, tell her they're disbanding the club, and leave her the model kit as a reminder of their time together.
