(Siblings, parents, anything like that.)

Todomomo

Rei: walked in on the Phuck off Phoenix squad's Minecraft game and watched Manami put her Minecraft bed next to August's

August: August loves being Deaf sometimes. His room is right next to his parents room so he's just reading while his parents are... canoodling...

Haruhi: walked in on Rei and Mizūmi kissing, more traumatized than ever.

Hino: nope he's good at staying out of other people's rooms.

Eve: nope

Kirimina

Akane walked in on her ex cheating and said "👁👄👁 hell no."

Iro is nice.

Miruhawks

Dove walked in on her parents doing the naughty act when she was five. She didn't know what was going on and thought it was a sport. Look up scribblejuice's "I thought it was a sport"

Exactly what happened.

Iidamei

Tameiko walked in on her mom losing her arm.

That counts.

Kamijirou

Stormi heard it and walked in. She was fifteen.

Riitsu literally stopped caring and doesn't leave his room some days.

Dabi x Toga

Roman walked in on his dad torturing a hero when he was five. Dabi didn't know he was there and when he finally saw him there was an awkward silence followed by Dabi picking him up and leaving the basement while the hero screamed.

Nejitama

Amai walked in on sushi rolling

Phoenix walked in on Amai and Okuri

Mt.Kamui

You know she's walked in on them at least once.

Ryushot

👁👄👁 Megami watched her dad kill someone

Phoenix scared Daenerys so she went to her parents room and walked in on them. Daenerys slept in Meg's room that night.

HitoRei

Rosalind walked in on her parents summoning a demon.

And walked in on Roman and Dove kissing at that party. She had gotten up to get a drink and came back to them kissing.

Tetsukendou

Clarith didn't lmao

SetSero

Luka hasn't yet.

Nami is a baby.

Shintati

You know damn well Manami has walked in on something. Walked into the kitchen and saw her parents making out and was mad confused.

Riven, not yet.

Fatjoke

Spencer hasn't yet. She's walked in on her friend kissing her boyfriend and almost became a blood bender, but 😌💅🏾

Midotsu

Mariposa walked in on her mom and dad and was mad confused.

Kacchako

Osoro and Akane walked in on Okimi dancing around her room lmao.