March 11 to April 7.
The Isekai Quartet bridges the world of Overlord, Konosuba, Re: Zero, and Saga of Tanya the Evil and this month that world will merge into MapleStory for a month long event. Maplers with characters over level 33 can take part in the event starting March 11 and running through April 7, earning all sorts of rewards including mounts and furniture.
There will also be a game of Isekai Match available every 30 minutes of login time, up to three times a day. Match 12 cards to receive gift boxes containing even more goodies.
For more information on MapleStory, check out the official website.
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