彼氏ができた初恋の幼馴染の妹が最近やたら絡んでくる。 (Associated Names)

Haruto Kanda, Who Has Feelings for His Childhood Friend Karen Aizawa, Is Told That She Has a Boyfriend. Haruto Congratulates Karen as a Childhood Friend, but the Shock of Heartbreak Brings Him Back to Life When He Meets Karen’s Younger Sister, Ageha. “Watch Me! I’ll Make You Fall in Love With Me for Sure!”