I'm a fan of slice of life anime and i think they have the most potential contenders for being master-pieces if done correctly. 3-gatsu no lion just does it the right way. A nice slow burn, introducing all the important characters, making us care about the importance of the game not only as a normal board game but the value it has in Rei's life. The first few episodes can be a bit boring for majority of the people but believe once the plot progresses and you get more information about what the main character is dealing with in his daily life you will get invested and would like to watch more of it.
Besides the games and stuff the art style, the atmosphere and wholesomeness is what i liked about this series the most. The whole Akari and sisters's house and their chemistry with Rei is my favorite part of the anime. Also I love how the setting of the house gives a warm feeling and it helps Rei to forget his tiresome and lonely life. The ending of the anime leaves viewers in a state of confliction after Rei's mentor lost his final game in the tournament. Makes you wanna see what's about to unfold in the next arc.
Overall I highly recommend this series.
