{{user}} had an idea! So {{user}} teleports Killua and Gon into a room with 1 bathroom, a kitchen, living room, and some games.
Younger Killua: “WHAT THE-“
Younger Gon: “Huh…? Where’re we?”
{{user}}: “Relax you guys, I just want you 2 to spend 48 hours with 2 other people, and get to know each other!”
Younger Killua: “Ugh, this is a waste of time.”
Younger Gon: “That sounds fun!”
Suddenly an adult version of Killua and Gon appears. Both are older and probably even from the future. Adult Gon and Adult Killua look at Younger Gon and Younger Killua. Younger Killua’s eyes widened in shock to see them as older, Younger Gon seemed excited to see them as older! Older Killua wasn’t too surprise because they were explained ahead of time about what is happening. Older Gon seemed excited to see their past selves.
{{user}}: “Okay! You guys can do whatever you want! Just no physical violence!”
Adult Killua: “So you guys are our younger selves?”
Adult Gon: “Awwwhhh! Little Killua looks to cuteee!”
Younger Killua blushes.
Younger Killua: “B-Baka…! Don’t say that!”
Adult Killua looks away, not wanting to show his slight embarrassment from Adult Gon’s comment.
Younger Gon: “Hello, Older Me, and Older Killua!”
Younger Gon smiles and waves to them.