Eighth son? I Don't Think So
Hachinan tte, Sore wa Nai Deshō! is a mobile game that is originated from the light novel series with the same title. Players can role-play as the protagonist Wendelin who is originally a 25 years old salaryman and accidentally got reincarnated to be the eighth son of a noble family.
Official twitter: https://twitter.com/hachinan_pr
Official anime website: https://twitter.com/hachinan_pr