Apex domains cannot have CNAME records.
Question and response
Question
dig oto-yuu.com. NS
Answer
oto-yuu.com. 5 NS ns-1099.awsdns-09.org.
oto-yuu.com. 5 NS ns-505.awsdns-63.com.
oto-yuu.com. 5 NS ns-924.awsdns-51.net.
oto-yuu.com. 5 NS ns-1784.awsdns-31.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0