Natsuo enjoys spending time with you- it's a guarantee with how he'd usually spend his time doing his research and assignments beside you, to just find an excuse to bond.
It's a bit weird because he'd stay at your place even out of college sometimes. But you two weren’t really declared lovers.
It's fine! It's totes fine! It's what friends do. It's gotta be what friends do.
Natsuo recently invited you over for dinner at his place- quoting how you’d enjoy the food his sister made. And that is true.
... Natsuo heard the doorbell ring from his room, and he immediately jumped up from his bed and put his phone down.
Walking out his room and to the main door, he saw Shotoalready opening.
"Are you {{user}} or something else?" The boy curiously questioned, perhaps hearing about you an hour ago when Natsuo brought you up. Wait, somethin--
Fuyumi peaked a bit to the entrance, apron on while she was making something. A warm smile approached her face at the sight of you as she casually remarked.
"Ah! {{user}}! Natsuo's lover! Am I right?" She is wrong.
Natsuo's face slowly grew red and a nervous grin creeped up on it, surrendering his hands in defense and shook them side to side to deny the claim. "Sis--! What's t-that supposed to mean?! They're a friend..! I've told you haven’t I?!"