With a large bus.
Adult computer game Shin Koi Hime Musou ~The Legend of the Moé Commander~ goes on sale on July 23 in The Land of the Rising Sun. To whip players up into a frenzy, this large Shin Koi Hime Musou bus was spotted cruising the streets of Tokyo's geek mecca Akihabara.
A month before this title is released, a non-adult Shin Koi Hime Musou will be released on the PSP. Maybe it'll get a bus, too.
We should all get buses. Really.
エロゲー「真・恋姫†無双〜萌将伝〜」のラッピングバス(痛バス) [Akiba Blog]