Probably what Kunoichi is dragging him away from in the previous drawing. (OK, so his costume is completely different, so I guess this is a DIFFERENT occasion.)
If I'm not mistaken, Xing Cai and Zhu Rong were the two girls he takes into battle with him at some point during the Shu story mode?
It's probably not clear, but that's Meng Huo in Zhu Rong's thought bubble. Magoichi is definitely a step up. (Speaking of Zhu Rong- she looks completely different from the way she did in DW3! I think she's a lot prettier now. XD Too bad she never wears any proper clothing.
...Gak, I completely forgot to draw Magoichi's other arm. Ohhh, well. Imagine what you will.