Poseidon x Hades.
It can also be said that the story of a certain god wearing the skin of Poseidon and a certain god wearing the skin of Hades happened in SS.
Stubbornly choose fan fiction over originality.
Whether Poseidon is attacking or receiving is a question worth pondering. Should Hades stand up and overwhelm Poseidon, or bear Poseidon's offensive? This is a question I don't know.