Light behind the corner (слэш)

"This one is perfect," Kac-chan interrupted, pointing at one paper with a spacious living room and a small balcony. "The apartment is right between our agencies. Twenty minutes' walk or a short train ride. Two bedrooms, one bath though, but I guess it will do."
"Uhm... okay?" Izuku mumbled, still confused about why Kac-chan was talking with him about apartments.
"Good. I'll write to the damn landlord, so hopefully we can take a look tomorrow."
And with that, the blond walked through his door and slammed it shut behind him.
Izuku was left in silence, left with his own thoughts.
His brain churned until it clicked.
"HAAAAHHH?"
 
-----------
Or: Katsuki starts to show his love for Izuku. Everyone sees the signs except for the green-haired nerd in question. But it definitely does something to him.