Lestheras

Haikyuu and Yuri on Ice crossover?

Featuring:

two Yuri

two sport anime

two voice actors

two much salt

Tsukishima and Plisetsky are voiced by Uchiyama Kouki

The Baskerville contract is a bit of a mixed bag considering ageing. Looking at a couple of the Baskervilles:

Levi - actually, Levi doesn't seem to age, he just adds more bandages

Oswald - seems to be affected by ageing. After all, Oswald's first contract transfer occurred when he was relatively young. Compare to Gil's age when his first transfer was planned.

Lacie - Is affected by aging

Jiri - Is old, but we never see her physical appearance. We also don't know if she has a contract.

Leo - Newly contracted, effect of contract unknown

Lottie, Dug, Lily, Fang - Surfaced from the Abyss only recently. Their age in Sablier was preserved in the Abyss. Can't determine if ageing occurs or not.

Zwei - Was present at Oz's first Coming of Age ceremony. If Zwei was about 15 during the event, he/she would be at least 25 in the current plot...but he/she looks no older than Oz. 

Gilbert and Vincent - Both had a Pandora Contract before/above their Baskerville Contracts, shouldn't have aged.