A story about a 212cm military otaku with "Sensha Otoko" as his handle name. Despite his huge and imposing appearance, he is actually very shy, and thus had no girlfriends. One day, he saves a teenage girl from being harassed and promptly fell in love with the girl. However, because he has no experience in romance, he consults his otaku friends on the web-board Eirei Throne-Channel for advice. This is the beginning of a True Tank Story.Sensha Otoko - A True Tank Story is a parody of Densha Otoko that was part of the moon.cinemas.jp 2009 April Fools' Day joke. The manga was published in the Type-Moon 10th anniversary book, it was written and drawn by Haruno Tomoya.

From MangaHelper:

In a land far away, the evil demon lord ruled with absolute power and cruelty. But a group of heroes combined their strengths and conquered obstacles to finally reach the demon lord in a final fight. When the sorcerer cast the imprisonment spell that was supposed to trap the demon lord, it also dragged all the heroes into a different dimension.

The demon lord, who looks and acts like a teenage girl, has lost her legendary powers and is forced to rely on the heroes to find a way to escape the prison. The sorcerer, who is leading the search on how to break out of the spell, can’t help but to tease the now powerless, bratty and emotional demon lord that once was a threat to the entire world.

Kazama Kenji likes to believe he is something of a delinquent. Moreover, others seem to like to agree that he is. Of course, Kenji's gang finds their way to a group of four not-so-normal girls - Chitose, Sakura, Minami and Roka - and all at once, whatever reputation he may have, is nothing compared to the outrageous behavior of the girls. Shanghaied into joining their club, what will happen to his everyday life from that point on?