I KISSED MY GIRLFRIEND'S LITTLE SISTER - LIGHT NOVEL (2022) DIGEST-SIZED NOVEL #1

Its been a month since Ive started dating Haruka, my first ever girlfriend. We even finally reached first base today-holding hands! Todays also special for a different reason-my dads getting remarried, which means I get a new stepsister. Her name is Shigure, and shes pretty much the spitting image of Haruka. Thats no surprise though, given that shes actually Harukas long-lost twin sister! Due to family circumstances, they were split up at birth. Her presence adds a new, twisted form of love that tangles itself into our protagonists passionate love life! He cant possibly tell his girlfriend whats been going on!