Entangled with the Champion! - (Cynthia x Male Reader)

Y/n, an Elite Four member of the Sinnoh League and a childhood friend of Cynthia has went missing. Cynthia is now set on finding Y/n so that the Sinnoh League can now go back to its regular form. Upon finding him, she learned that Y/n has lost the will to fight and deemed it boring anymore. Cynthia has then made an interesting proposition that got Y/n flustered. Will this let them relive the old times when they were younger? Will this make new feelings develop or even old feelings reignited?