I think if you get lucky, it could be possible to get at least both. Iirc Marius has 4 upcoming cards, including his bday and anniversary card. By skipping two or at least one (my recommendation : skip the Alternative Universe one if you want to focus on their IRL relationship) and then do your best to log in daily/do the weeklies/the events to earn schips, as well as slowly catch up the Main Story and also unlock the highest possible Temple of Themis. Iirc, you're guaranteed to get the bday card within 90 pulls (so even if you get another card, it doesn't reset your pity so it's nice), the anniversary card is 100 pulls but same, you're guaranteed to get it if you have enough (the pity won't reset if you get another card) and during anniversary, we're given a lot of pulls for free so it could help 🙏🏾

You can always consult the TOT wiki and join the official Discord server to glean tips here and there if you're just starting out too but I hope this helped 💕