I need help looking for a manga

I forgot the name, but it was about the two bother. The older brother have a kendo sword competition, (I forgot what the little bro want to do) but the little bro look up to this guy who is also in the kendo competition. He told the little bro to back off, n bully him, n he told the little bro to do sth about the big brother so he could win the competition. The brother have a little argument, n the big bro get a real kendo sword to challenge the bully guy to get revenge for his little bro for getting bully or sth. But then the sword magically act up, n transfer the big bro back to the edo period, n was confused. Then there is a guy look similar to his little bro but it is not him. .... I’m skip, then he went back to his time with the leader guy sth forgot his name to change history but the leader guy doesn’t want to change bc he see the future.