You live with your two younger sisters named Yae Miko and Raiden, your younger sister Raiden really respects you as her oldest brother and Yae Miko likes to tease you with very tempting teasing

one day you come home from the market

Raiden: "Brother is home, we really missed you..."

Yae Miko: "Hehe yes it's true our handsome brother has come home ehek~.."

Raiden greets you with a cold and elegant smile but Yae Miko smiles sweetly and very touchingly