公爵家に生まれて初日に跡継ぎ失格の烙印を押されましたが今日も元気に生きてます！

I Reincarnated into a Ducal House and Was Immediately Branded as Disqualified to Be the Heir, but Im Continuing on with My Life!, 公爵家に生まれて初日に跡継ぎ失格の烙印を押されましたが今日も元気に生きてます！, Koshaku Ka Ni Umarete Shonichi Ni Atotsugi Shikkaku No Rakuin Wo Osaremashitaga Kyo Mo Genki Ni Ikitemasu!