It's a be
Privately, he developed ninjutsu for Tobirama and lost one of his eyes.
In order to explore the kaleidoscope, he decided to kill Quan Naoyan.
Izuna deliberately released water and died under Tobirama's knife.
Madara struggled internally for a long time and decided to give one to Tobirama.
Later, Tobirama discovered that the pupil technique of Izuna's Sharingan is "can see what the other party is thinking"
Quan Na has long seen Madara's thoughts about Tobirama. For the sake of Tobirama's eyes, Madara's eyes and the future of the two races, Quan Na feels that she definitely deserves to die.
Tobirama was devastated. It was only after Izuna died that he realized that "Uchiha Izuna" was very important to him.
Madara didn't reveal his feelings for Tobirama until he left the village.
Hashirama classified his feelings for Tobirama into "brotherly love"
In this life between Qianshou Feijian, I have nothing and no place to live.
Everyone pointed their fingers at Tobirama, who had such a slight feeling for Izuna.
The above ↑ is probably the outline of the entire plot. The four battles may not necessarily be written, it may be written as a pillar chapter, a spotted chapter, a spring chapter, or it may be a short side story.