The next spin-off just writes itself.He calling his sister than the brother going to meet his online friend which in turn is Shu sister...how nice
That's clearly obvious indeedCalling it now, it's Shu's sister, both the person Makoto met online and the person Shu ends up calling over
Less likely because they're HER friends and not HIS. It wouldn't be Japanesey Proper for him to impose on them.He could just as easily be contacting the Takasakas for help, too.