If you're looking for manga similar to Girls und Panzer (Light Novel), you might like these titles.
Koma Jinguji (Jay) is the smart and handsome student council president. His elegant smile captures the hearts of women. Tsubasa Hayakawa is a multi-talented and gentle shop assistant at a café. His cafe latte with owl latte art is very popular with female customers. The two men travel through time to fight their archenemy. The charming "Butlers," as they are called, fight supernatural battles and also experience a slapstick comedic life at their academy.
Humanity has successfully colonized all the planets in the Solar System, with intentions to continue into new frontiers. Individuals live stable lives in these colonies, including young high school students living in 4th Tokyo on Mars. Two of these students are Iris Shirazaki and Mizuki Sera. Iris is finishing her last year of high school while studying to be a test pilot while her friend Mizuki also works as a mechanic on the aircraft. Her own brother, Kaito, oversees Mizuki and Iris as their homeroom teacher and program director.
The year is 1969 and alien invaders are trying to dominate the world. The only hope for Earth is AEGIS, a group of teenagers with the special ability to open 'Gates' that let them harness elemental powers gated from another dimension. AEGIS must now seek out other gatekeepers in order to stand a chance against the destruction of the world.
Pretty Sammy is a light comedy taking place in an alternate Tenchiverse. Sasami, the adorable girl from Tenchi Muyo, gets the spotlight as she is turned into a "magical girl" by Tsunami, an otherworldly woman from Juraihelm. However, Sasami's best friend is also transformed into a magical girl, and consequently, her arch-rival. Hijinks ensue in this strange, but funny series.