Hi-sCoool! SeHa Girl - Episode 1 - Dreamcast Transformation
Sega Dreamcast transforms from chibi form to bishojou form to fight.
An eleven minute commercial for old Sega consoles is a weird premise, but I guess Sega wants to pay for it. Nice pun on High School also sounding like Hi Score to lazy tongued native Japanese speakers. I prefer Hyperdimension Neptunia, because part of the fun was seeing how the creators would take artistic license with the known brands. Still, if you're nostalgic for Sega's golden age, you'll like the jokes and references here. Saturn and Mega Drive (aka Genesis in North America) are represented too.