Gianizm Ten by Nightmare this one has VERY heavy pitch correction throughout you’ll probably hear it without trying as you can even hear his voice crackling being snapped on pitch. But focus on the held notes such as 2:31 and 3:51 you’ll hear an unnaturally straight note. A common counter is that maybe the singer is “just that good” which we know can’t be the case with Yomi
Baretta by The Gazette in 2006 this one is slightly more subtle but to the untrained ear is very well hidden. But a very noticeable point is the word “yorisoeba” at 2:12 and “warau darou” at 2:56. Someone who knows a little more about vocals would recognize that Ruki is actually reaching quite a bit to stay in key. Clearly an uncomfortable part of his register and he slips out of key a bit. Yet somehow he is perfectly on pitch at times which is just not realistic. That form of singing just wasn’t sustainable which is why he drops that singing style and focuses on maturing his more comfortable register. Their 2018 performance of Baretta actually is not pitch corrected. Ruki sings it in a more comfortable key and I for one think it’s a much better performance both vocally and stage presence from Ruki, Aoi, and Uruha.