2 things: what the hell happened? and i don't think this may be family friendly based on horror Nitori, the blood/filling and the highly wounded hand of the first panel.
I'll give my own theory, it still won't make it FF since there are to many things that debunk the tag but here we go.
Anon Makes a House for the yukkuris. The joke is that it is "meant" to look like the anon is going to abuse them when he won't, reason why the bloody "10 minutes later" panel and the omnocious feel of the first panel with the banged up anon hand, the tools and the yukkuris.
Still because of the anon's wounded arm, the "Nightmare version" of the Nitori and the "Bloody 10 minutes later Panel" this can't be FF, it clearly is Non Violent that grazes FF out of story style though, but no FF tag.
What justice said is right, At first it was going to be a little longer but I did not like how it looked all together. So I figured shorter is better than horrible. Also the FF tag was just a slip up it was a late night so yeah my bad.
No Problem, everybody is new when they start and everybody while being new may have a hard time understanding some of the tags we use so mistake can easily happen. . .i do still have some issues with some tags even now a days >_>U
Anyway welcome to OYP, hope we can see more of your work, but i would recommend to recheck the structure to avoid this "wut?" situations.