The Two Worlds Cross Each Other: What Does It Mean That My Family Has Declined?

(Behind the scenes + no heroine + double penetration in another world + vest + micro-gram series + manifestation in front of others) "What do you mean our family is in decline!?" Before he died, my grandfather left me a letter and told me: When I am overwhelmed by the burden of life, it is time to open the envelope. Finally, fed up with the same routine of going to school during the day and working part-time at night, I took out the envelope. But when I took out the envelope and saw the first line, I couldn't help but feel stupid. Didn't you agree that you would return to the countryside, inherit a large piece of land, and then live a leisurely pastoral life similar to Stardew Valley? Why do you want to inherit a family that you have never heard of! The next day, the male protagonist who came to another world returned to his loyal (all evil) family. "The situation has really taken a turn for the worse!" In the other world, he chose to farm and grow slowly, and became a hoarding rat; but in the main world, some useless small objects he scattered around could cause a storm!