MY Fermentation specializes in fermentation techniques and serves coffee from Terres de café, using a La Marzocco for brewing. Open since March 2025, the café offers a variety of espresso-based drinks, including an espresso for €2.70 and a flat white for €5.50. Located at 3 Rue Saint-Bon, the café blends in with the historic charm of the 4th arrondissement, providing both indoor seating and outdoor options when weather permits. Closed on Mondays and Sundays, it also features sweet and savory food, plant-based milk alternatives, and takeaway drinks.