If the cloud is just the will of someone from the different dimension, and this girls cloud is Honjou what if Matsuda's cloud is the Sniper Mask? it would make sense if Sniper mask put his will into a rifle.
An absolute masterpiece, a top tier romance manga that doesn't make me want to scream at the characters. Very little drama and it ends phenomenally, 10/10 id go so far as to say its the perfect romance. highly recommended!
There was absolutely no reason for that to happen to Monica, if you removed her from this chapter the plot would have progressed the same way. It feels like they added it in just for the shock value, it isnt even fun or interesting to read.