Suzumori Ichi

Chitose is a high school baseball player who had to abandon baseball due to injury. One day, when Chitose was spending a boring day off without any goal, Chitose's life changed completely with a "VRMMO game" that was suddenly sent by his sister Haruka! "Oy Onii-chan, let's play a game together in our spare time!" A high school baseball player became a gamer at the invitation of his cute sister!? Using his "excellent baseball sense" to enjoy a fun game in a VR world!

Monsters have long threatened humanity’s existence. To fight against these beings, Keith, the youngest person to ever become a sage, joins a knight order and shows immense success on the battlefield. However, that doesn’t last long, as a quarrel with an incompetent higher-up gets him fired from the order. With nowhere to go, Keith is assigned as a teacher, and with his talent for bringing out the best in his students, his class is about to reach unbelievable heights… Source: Manga UP! Global