ROYD-305 Mei Eien - My sister is plain and modest, but when she took off her glasses, she was a beautiful woman of the highest caliber and w

My sister-in-law is usually plain and doesn't wear makeup. But I know. I know she's beautiful! I can't help but offer advice to my sister-in-law when she's struggling with interpersonal relationships. This sparks a rapid improvement in her makeup skills, and she gradually gains confidence. Eventually, she transforms into a stunning beauty with an amazing figure that turns heads wherever she goes. But as her brother, I can't keep quiet. One night, when our parents are away, I impulsively confess my feelings...