Riku Mikumo

Оригінальне ім’я: 三雲理久

Riku is Nene's younger brother who has a crush on Sumire. Multiple times, Riku attempts to ask Sumire out on a date, but something always interferes, leaving him heartbroken each time. He has a timid personality, which makes it even more difficult to ask Sumire out. (Wikipedia)