InuYasha (2000)

S2E21 Inside Naraku

Inuyasha and his friends set out to confront Naraku, leaving Shippo behind. Upon locating Naraku and Byakuya shrouded in a thick mist of miasma, they witness Sesshomaru entering Naraku's body, searching for Rin. As Inuyasha's group makes their way inside, Miroku takes a moment to propose to Sango.