The manga runs long enough for me to know that this "I like you" is not the "I like you" the boy wants to hear. I think the reason she won't just reject him out right is that she learned enough about the MC to know it wouldn't work and he would just start bothering her and the people around him...
Other than expanding on Sumi and presenting all her thoughts it seems to also go into more details of their line of work than the main series did, interesting.
Aniki will come back take his wife back, as well as sensei, the girl is more into Kyokou anyway, so the kid gets nothing and does his training in the corner.
Thanks for fixing my shit, now you can enjoy this human-less world that I destroyed trying to bring our crush back from the dead.
I'll even leave you in the body of this gorgeous babe and will go to have my perfect life with our crush's version from your world.
So long sucker.
I guess his...
Isn't that convenient, if the police got involved they'd be able to call her bullshit and if they ever search his apartment would probably find the camera.