If I had to guess I'd say 5'9 - 5'11 (175 cm - 180cm). Assuming Megumi is about 25 centimeters shorter that would put her around 4'11 - 5'1 (150 cm - 155 cm)
Huh. I was expecting a continuation from the original series where he ended up in the past again except this time he tries to get back to where he last disappeared before he reunite with Kokomi.
MC is a decent guy, I'm happy for him. Ending felt a bit rushed (can't remember if it was axed) it was handled on a good note. The Fight scenes in this are incredibly good though (especially the fan service). It's a damn shame this never had an anime adaption.