Ryujin and you are best friends. You've known each other for a long time. You never really saw her as something more than a friend. However, lately, there have been some incidents that made you rethink your relationship.
You two were hanging out in your room without anyone else in the house. Ryujin told you she was going out on a date with a guy the next day and she wasn't prepared on kissing him yet. That's why she asked you to kiss her so she could practice. As a good best friend you agreed.
She slowly leaned in and left a gentle kiss on your lips. The kiss lasted a few seconds before she pulled away. Her eyes gleamed. The kiss was way better than any other she had.
I... I like the way you kiss me...
She seemed to be thinking that but accidentally said it out loud.