I Thought We Were Sisters, But You Want to Sleep With Me?!

Lumina is straight and plans to confess to her straight best friend.

Her best friend is the greatest person in the world.

Her name is Timothea. She's beautiful and handsome, an angel who rescued a damsel in distress when Lumina was in danger.

Lumina herself has skin hunger. She loves cuddling with her best friend, and to prevent the tragedy of making things awkward for her friend from happening again, she made Timothea swear: "You're not a lesbian or bisexual, right?"

Her best friend swore she wasn't.

Oh, she also had an ex-boyfriend, the young master of the Drake family.

Lumina felt even more reassured.

So she could happily share everything with the first real best friend she'd ever had: ranting about trashy men, admiring handsome guys, and getting drunk and hugging, kissing, and cuddling with her. At first, Timothea would suddenly leave with a strange look on her face. Later, she became not only sweet and caring, but also taught Lumina all sorts of things.

"Can best friends really do all this?"

"Oh, my dear Timothea, if you were a man, I would definitely fall in love with you."

Then, as they spent more time together, Lumina realized she had fallen in love with Timothea.

That wouldn't do! It would be so unfair to her straight best friend!

After a painful internal struggle, she finally confessed through gritted teeth and prepared to disappear:

"I'm sorry. Even though I've always said I'm straight... I think I suddenly realized that I've fallen for you. I know you're straight, so my feelings must be a burden to you."

"But I still wanted to tell you."

"I won't make things difficult for you. Let's go our separate ways."

She left the woman she loved, who also made her ache. When they met again, she discovered that the frivolous suitor (aka her best friend's ex-boyfriend), the vigilante she had admired, and her dear best friend were all the same person.

Wait! Then did she cut her nails for nothing?!

*

Tim was troubled.

His meeting with Lumina began with deception, three kinds of deception: his ordinary identity, his vigilante identity, and his gender.

He knew there were things he shouldn't do, things that went against morality and justice. But Lumina started it first, didn't she?

How could he tell her the truth and confess after... she'd trusted him so completely and shared everything with him?

She was growing kinder and closer to him by the day. If things continued this way, they might reach a point of no return.

There were so many things he'd done that he couldn't let her find out about.

With his other two identities having both failed, there was no way she could fall for him in women's clothes, right?

...Wait, that's not right!

*

● OOC warning! Pure romance! Everyday life, everyday life, everyday life! Lots of little headcanons and kinks; Tim's self-delusion and tricking an innocent girl into falling for him. A sweet little treat, but please note that the male lead has some questionable ideas about relationships! [There will be a little groveling!]

Screenshot taken on 2026/2/11

Kink-focused story, lots of original worldbuilding, apologies

All the out-of-character stereotypes are mine; the glory belongs to the original work.

*The heroine assumes from the start that Tim is a girl, so there will be lots of best-friend chats! (And they'll go beyond friendship.)

The Damian BG story next door is complete!

Come on in and give it a try!

Theme: Don't assume your sexual orientation can't change (I'll revise this once the editor gets back to me, hehe)