Two young wrestlers face each other in a recently revived underground wrestling organization, the Tiger's Lair, which destroyed the wrestling dojo they grew up in. One took over the training facilities of Naoto Date at the foot of Mount Fuji, as well as the mask he left behind. The other dared to enter the Tiger's Lair and won a fierce competition, receiving a jet-black tiger mask. One tiger walks the path of light, while the other walks the path of shadows. Neither one knows the other's face. On the ring, they are natural enemies, but they have the same purpose—destroy the Tiger's Lair! (Source: MAL News)

For Uncle, a lecherous but handsome toilet designer, it is just an ordinary day of neglecting his duties as a single parent to hit on women and talk about his superpower: his ability to tell a lady's hip size at a glance. But when he is sucked down into a toilet, the Space Peace Republic Alliance Hero Committee gives him real superpowers, and he becomes the hero of Earth. There is only one problem—he has become an ugly, unrecognizable fatty who is unable to reveal his real identity. Uncle's beloved daughter Min-chan does not believe that such a vulgar fatty could be her father, and casts him out of his own home. Distraught and homeless, he joins up with his perverted neighbor Yamada-san, a small man with a fondness for streaking, and sets out to convince Min-chan that he is her father. Full of sexual innuendo and slapstick humor, To Be Hero follows Uncle as he befriends bizarre allies and combats even more bizarre foes, fighting for the future of earth against aliens and—more importantly—his future with his daughter.

Time Travel Shoujo is based on a 1983 book titled Jishaku to Denki no Hatsumei Hakken Monogatari by Japanese educator Kiyonobu Itakura. It is part of the Hatsumei Hakken Monogatari Zenshuu series which describes the story of various scientific discoveries and inventions throughout history. The 1983 book focuses on discoveries related to magnetism and electricity.

Extra episodes of To LOVE-Ru Darkness 2nd bundled with the seventh Blu-ray and DVD volume.