This will be a bit complicated event, I think it will happen for fan service due to reputation down happening and also, a lot will play out like Sakura will get reality check because of Nagi but says it's too late because it's been a few months has passed in Timeskip and here, Shinobu realize that Fumi captured his heart(He's Reacting for her) compared to his time with Sakura so, he's better off with Fumi and also, Sakura will definitely suffer but knowing this author that love this shitty Sakura of hers? She'll make her stand and strong because of her regrets and move on.