Ore no Isekai Shimai ga Jichou Shinai!

“Live freely for my sake, remember to be happy.”

That was the last word Yuya heard from his last remaining family member which was his sister.

However, Yuya caught the same disease as his sister, his life ended without fulfilling what his sister wished for.

――That was what supposed to happen, but instead rebirthed into another world.

Yuya was confused, but also found a resolution. That is, to accomplish the promise he made with his sister. Yuya pursued happiness as the second son of the count family――Lyon’s life was just about to start…..

――What? Because I’m the son of a mistress so I can’t get out of the isolation zone? Forbidden from studying? Political marriage is decided? If that is the case how can I freely pursue my happiness??

Feeling he was cheated by fate until one day, he met a girl. The story of a boy pursuing happiness and his sisters with no self-reverence starts now.