Interesting. Is that last line supposed to read, "Real Yukkuri don't bounce back?" (Applying fridge logic: people don't bounce back, but yukkuri might. Doesn't change anything though.)
For something similar, try the "Yukkuri No More" series.
basically it was an anti-abuse message, roriginally based on a commercial about child abuse, check vicvic's link to see what it was about.
Of course, the truth here is that a YukkuReimu will NEVER be the Reimu, and about abusing boddied yukkuris, well, that really depends on each one, i kinda don't think it's proper since it seems Bodied Yukkuris tend to be less trash overall, with very few exceptions, maybe the exta beanpaste gives them more intelligence?
You don't even know who that dude is. Judging by that kick, it could be Duke Nukem or something... in casual clothes... with his hair grown out, and you always bet on Duke.
uh, so how am I supposed to understand the last frame? the youtube link above has died for some reasons so I can't get any explanations from it.
If I remember correctly it was this video: https://www.youtube.com/watch?v=P1m1VTQTNfk. Since that link might also cease to work in the future, the implication is that the final frame is the reality and the previous panels are substituting an imaginative depiction of the abused.