@greatninja3
You seem to be confused... I'M AGREEING WITH YOU.
The ecchi tag is similar to a high school romance movie; there's some kissing, maybe some groping, and an implied sex scene.
The smut tag is like soft-core porn. You see a lot of nip, a lot of groping, and sex scenes without seeing genitalia.
The H tag is hardcore porn.
This manga does not need a smut tag, because they're one-shot stories about 8man and Hiratsuka in different stages of multiple alternate universe relationships. No nips. It's ecchi at most.