I Fell for My Friend's Older Sister

Rio is everything that Haruto wants in a girl: gentle, nurturing, and ladylike. The only problem is that she's the older sister of his best buddy Nao, and he fears that the difference in age means he's barely on her radar. If Haruto wants Rio to see him as more than her little brother's playmate, then he has to prove himself as a man in her eyes, no matter what it takes.

Meanwhile, Nao grows frustrated with Sena, a loudmouthed friend of Rio's who's too nosy for her own good. But what irritates him more than the constant pestering is how she just can't see him as more than a little kid. Can he help her get a clue?

Haruto and Nao's relationships are going well, but that doesn't mean there aren't roadblocks to overcome. A change in Haruto's personality has Rio on edge about her immaturity, and Sena's so used to men treating her like a temporary plaything that she barely seems aware she and Nao are dating. How can the two boys help their girlfriends realize how special they are?