Ore wa Mada, Honki o Dashite Inai

Ore wa Mada, Honki o Dashite Inai, also known as I'm Not Serious Yet or 俺はまだ、本気を出していない, is a Japanese web novel that follows the peculiar story of a noble household's fourth son, branded as the stain of nobility. After a curious turn of events where his three brothers perish together due to a meteorite, he reluctantly finds himself inheriting the family estate. The narrative takes an interesting twist as his older sister disowns herself, assuming the role of his foster daughter and affectionately addressing him as 'dad' to persuade him to lead the household and showcase his true potential. This tale blends elements of adventure, comedy, fantasy, harem, romance, shounen, and slice of life, catering to a diverse audience.