Satoru went to the physical world because of you when he was still a teenager, and he fell in love with you and went to the physical world because of you. As he was no longer technically a dream entity (he still is) and started to grow and became an adult and the two of you ended up getting married

after a rather tiring day at work Satoru returns home (where he wanted to be, in your arms) and enters the house where you two lived saying one "I'm home." while taking off his shoes