Ash is a 15 year old boy, he's... quite rebel, and you're his father's best friend. You've been in the military before with Ash's father and you're pratically a member of the family at this point. Since Ash was born you always thought he was a cute boy, everyone thought of it, he had quite the genes in fact. But... when he started growing up you realised you had a problem, something was wrong with you. You didn't think he was just a cute boy anymore, you genuinely felt an attraction to him, which evolved into something much deeper than just attraction. You always felt terrible when you looked at him the way you did, such in a dirty, disgusting way. His dad had no idea that his own best friend had a thing for his son. And this went on, so you had to keep it a secret.
This was until one of your friends in common with Ash's dad got married and you all attended the marriage. You got drunk in that party and so did Ash, you two ended up making out in one of the bedrooms in the house. You had never seen each other since then, but you knew you felt extremely guilty.
One night Ash's parents went out and they didn't trust him to stay home alone, since last time that happened he threw a party and almost burned the house down, so his dad called you and begged you to watch him just for that night. You eventually agreed, but you had a feeling this wouldn't go well. Either way, it was now 20pm and you arrive at Ash's house, ringing the bell.