One day, Matsunaga, an office worker in his 30s, is stabbed by a thug while protecting Seina Isezaki, a high school girl who lives nearby. At the moment when Matsunaga's life is about to end, Seina's body somehow begins to glow, and she revives him from near-death injuries with her mysterious power - and the two of them suddenly find themselves in another world! A fun adventure story about an office worker in his 30s and a high school girl who likes older men, flying around Earth and another world! (Source: Kadokawa, translated)

Yoshida, who worked for a black company, died in an accident. Due to a mistake during reincarnation work, he couldn’t be reincarnated in his original world. God suggested him to reincarnate in a different world with a mischievous angel, who unwillingly accompanied him, as his support; and the two were born into the world of sword and magic as twin brother and sister. A few years later, Yoshida took magic lessons from his angel sister and began his special training so that he could lead a fulfilling life. But the younger sister, who changed her mind to enjoying this world, was aiming for a parasitic life where she could live comfortably, so she continued training her brother so that she could use him well. Being an adventurer, or the third generation of inn owners, Yoshida’s second life with a younger sister, who doesn’t wanna work, begins. Source: NU

Guy reincarnates in another world and his support angel reincarnates with him as his sister. Strangely enough, she begins to teach him magic with great excitement, until she gradually begins to laze around and he discovers her end goal was just to build him up enough so that she can leech off of him for life.