Long fluffy hair, hat, sunglasses, short scene and anime. Hard to tell that a sub 40 guy feels very old in that context.
Impregnates Himeka's mum at 15 because he's a super genius manipulative very good looking guy with blond hair.
He's 20/21 when he impregnates Ai and Ruby/Aqua are born.
He's now around 36/37. You can even push to his 17 with Himekawa's mom, some males grow a lot more manly from 15 to 17.