With Yanbai playing dead, he naturally tried to stay out of Konoha's development as much as possible.
Tobirama Senju remained busy even after stepping down from the Hokage position.
Just like the Second Hokage, Uchiha Izuna, who still had to run the Konoha Military Police Force and fulfill his duties as Hokage Advisor after stepping down, he never had a moment to relax.
After Tobirama Senju stepped down as Hokage, he handed the Anbu over to the new Hokage, Uchiha Akira. He still had to personally walk Akira through handling Hokage affairs during the six-month transition.
In addition, Tobirama Senju had to continue researching ninjutsu and forbidden techniques while overseeing Konoha's scientific research and agriculture departments. He was, if anything, busier than before.
Tobirama Senju had wanted to move in with Yanbai and get three free meals a day while he was at it, but Yanbai lied to him, saying he was going to "cultivate immortality" and would not be eating.
As if. Madara was still here.
If Tobirama came every day, he would find out sooner or later.
Still, to show his concern for his older brother, Yanbai often had the little animals deliver tasty food to Tobirama Senju's workplace.
Tobirama Senju could only regretfully visit Yanbai every few days and make off with some snacks Yanbai had "specially" prepared for him. He never managed to live with Yanbai long-term.
To keep his only remaining older brother, Tobirama, from overthinking things, Yanbai found a way to make him so invested in working overtime that he could not stop.
Yanbai drew up urban development plans for Tobirama Senju.
After seeing those plans, Tobirama Senju simply could not stop building up Konoha, and so he became even busier.
Early morning at the Princess Mausoleum.
Yanbai sat high up on a