This was requested in the BBB One-Shots a long time ago.

It's a CyThun (which I interpreted as Cyclone being the dominant one).

Cyclone is a Yandere, and is over possessive on his Tsunderstorm (Tsundere Thunderstorm).

We know that Tsunderes have a soft side, and this side of Thunderstorm makes him submissive under the possessiveness of Cyclone.

Imagine a cute Cyclone requesting a romantic movie date with a fierce-looking Thunderstorm.

"Can we watch Titanic?"

"You know how much I hate romantic movies."

"Please?"

*sighs* "Fine."

Here's another scene:

"Who's the one you were talking to earlier?"

"It's just Solar, my friend."

"Only a friend?"

"Yes."

"Really? Then why did he ask you to meet him earlier?"

"Cy, that's what friends do."

"..."

"Okay, ish. I'm sorry. I won't meet him again unless you're okay with it."