同一住所は家族扱いできるので
https://www.softbank.jp/support/faq/view/10150#:~:text=%E3%80%8C%E3%81%94%E5%AE%B6%E6%97%8F%EF%BC%88%E8%A1%80%E7%B8%81%E3%83%BB%E5%A9%9A%E5%A7%BB,%E3%82%B0%E3%83%AB%E3%83%BC%E3%83%97%E3%81%8C%E4%BD%9C%E3%82%89%E3%82%8C%E3%81%BE%E3%81%99%E3%80%82
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