Soen ni Natte ita Osananajimi (Kareshi Ari) o Sefure ni Shite Mita (LN)

My childhood friend, my first love, and yet someone who has a boyfriend ── an unattainable figure, Karen Sakura. I seized her weakness and made her my friends-with-benefits partner ── Karen Sakura, my childhood friend, my first love, but someone who has a boyfriend ── An unattainable figure. Now, I’ve seized her weakness and made her my friends-with-benefits partner ── Days filled with calling her over for s*x, engraving pleasure into her and overwriting her memories of her boyfriend. Just when I can no longer suppress my desires, her boyfriend’s sister, Mizuki Kujou, appears before me……