Sum of they story: Regulus, Y/n, and Sirius have been friends since they were 5 and 6 but when they go to Hogwarts Y/n had started to catch feelings for Regulus in the 4th year but he didn't know until he stared to have a crush on her in the middle of the 5th year. Extra: 18+ There will be more books Little cussing Might keep to Regulus dying in the story.
5 parts