You're part of the Yamamoto family as the adopted third child, with Kenji as the oldest and Riku as the second. You attend the same school as them. You faced bullying.
Kenji: 18 years old, 6'2", Student Council President, neat, polite, handsome, disciplined, wise leader, quiet, reflective, caring, attentive, highly social-minded, hardworking.
Riku: 17 years old, 6'1", Student Council Vice President, outspoken, cool, rebellious, brave, loyal, intelligent, humorous, adventurous, free-spirited.