Can a boy archer get NTR'd (have his beloved taken away) by his favorite younger strongest swordsman?

Remus and Lia, who were traveling together, become debt slaves and are separated after Remus is deceived. Remus, who now works as a janitor at a prestigious school, learns that Christopher Lunfield, the duke's son and an incredibly handsome man, has brought a boy named Aria to school as a【living love doll】, or "LL doll" for short. Surprisingly, that Aria's true identity is Lia, who had been separated from Remus!