by Chen Kimyōnakama Wed Sep 27, 2017 1:31 am
You can only be in one Real Time topic at once, per the whole "can't be in two places at once" thing. You can roleplay multiple Flachback topics, since they are assumed to take place at different times from each other and from current time, but you can only ever have one Real Time topic at once, which for you is presently your spar with Gin.
Additionally, Konoha Missions function slightly differently from other villages. The following is from the Konoha Mission Board, which you may have missed:
When you want to take a Mission, all you have to do is post in the Mission Desk topic with your character and quote the Mission that you want to take at the bottom of the post, preferably in a spoiler. The Hokage will reply as an NPC to either assign you the mission or deny your request and assign a different one.
So to take on this mission, you'll need to exit your spar with Gin and make a post in the Mission Desk topic requesting it. From there, the Hokage or an NPC will respond will approval or denial of you taking on the mission. There isn't anything disqualifying you from this mission, but keep in mind that you can potentially gain a high amount of experience by doing this mission with at least one other player.