Parents remarried. My lover now became calling me "Onii~chan" (Associated Names)

We can’t show this to our step-mother now, can we Onii-chan~. Having his hidden affection bear fruit as he begins dating Torii Neneka, a classmate and a member of the same club, (the book club) the high school student Morita Daiki was now in a dilemma. Well it would be very well so, since after…