Oh My Goddess! Omnibus Volume 2 - Kosuke Fujishima

Oh My Goddess! Omnibus Book Two introduces the third of the Goddess sisters--the youngest, Skuld. It seems Keiichi's life wasn't complicated enough with Belldandy's magic and Urd's potions, so now Skuld is here with her personal form of weirdness--engineering! No sooner has she arrived at Nekomi Tech than Skuld appoints Keiichi's own little sister Megumi to be her arch-rival, and challenges her to a robot battle...to the death? Plus, as a special bonus, the universe will be destroyed when the superstring holding together existence is cut by a ten-dimensional scythe...unless the Goddesses can stop it. But that's just another day on campus in this manga!