Tomb Robbery: as Time Goes By, the Mortal World Is Forgotten

[Two male protagonists + group pet + be] I thought... I would live happily like this with my sister. But... Everything has changed, I don't believe it! People who don't believe that my sister is so powerful, just like this... After that, I went on a journey and met them. ———— "Sister, I'm here to find you!" "Sister, I will take you home." "Sister! I... Go home for you..." ———— "Little Third Master, there is no true person in the world." "Little Third Master, I said that there is no true person in the world." You and I... Are destined to be different people.