araneavalon replied to your post “…know what? hell. i’ve finished a final project, sopollination...”
Because I am a slut for angst Ruby and Yang being supportive sisters, and ladybug being the first to start dating in pollination if it's not all at once, Yang confessing that she's in love with Ruby's girlfriend. And Ruby trying to tell Yang that that's okay and reciprocated without outright saying it (she promised Blake), and without making Yang think that Blake's using her and triggering Yang's overprotective sister side.
So, strictly speaking, a focus on bumblebug! And it isn’t very angsty, given personal headcanons, and the other specifications. (As others will testify, often the best way to inspire me write angst is to give me a vague prompt.)
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When the thought first appears, Yang pushes it aside. Blake’s stunning, and Yang could sit and listen to her for hours, but she’s sure it breaks some sort of unspoken code to want to kiss your sibling’s girlfriend.
When it get’s really, really bad she mentions it to her dad, having no one better to really talk with.
He actually looks surprised, before he smiles, a crooked thing from the nostalgia seeping over its edges. “I wasn’t the only one who loved Summer.” His finger traces wood whorls before he adds, “The important thing is to be honest with each other always....Holding things back, usually just means it festers.”
So with that surprising (or maybe, not really?) piece of advice, Yang pulls Ruby aside for a sib talk, and lays it down. All planned out. The princess’d be proud.
Her thought after that, is why does her family keep smiling when she brings this topic up?
“It’s okay Yang!” Rubes chirps before she can ask, “We’re, well, we’ve talked, and me and Blake agreed on an open relationship! So, you could totally tell her if you want.”
Yang frowns, holds up her hand, mind clinging to Ruby’s words. “Hold a sec, just slow down Rubes: an open relationship? You agreed to that?”
Red blooms in their cheeks. “We both wanted it, actually.” They fiddle with the hood of their cape.
...Well. That’d explain the longing puppy stares after Weiss.
Ruby interrupts her thoughts again by holding her hands between their own. “You really should tell Blake. Like, it’s why you’ve been weird around her lately, right?”
Yang laughs sheepishly; it’s her face’s turn to burn. “Even you guessed, huh?”
“I’m your sib, I know what you look like when you like someone. But Blake doesn’t know, obviously. So you gotta tell her.”
“Fine, fine. But no laughing.”
Ruby gives a beatific smile, and presses a hand over their heart. “Promise.”