thanks for the chapter.
Tatsuya would never have accepted a duel, yesterday's rescue surely had an impact on the future and the situation of the Yotsuba in the timeline.
(Maya as well as Miyuki and Tatuya)
Good chapter, I don't mind about time travel effect to the future. I just hope you improve MC character to be less push-over. Saegusa requested MC to cook a meal for her, and the MC obeyed without hestitation.