it is ecchi
define ecchi: It's a genere in japanese anime and manga that reffers to erotic but not abruptly sexual content. It can show full to partial nudity, including nipples, cameltoes, panty flashing, grabbing boobs, but never exposed genitals, and is often displayed in a humoresque way. The term comes from the japanese pronunciation of the letter "H" (pronounced "eh-chi") as in Japan erotic content is rated "H" while in the rest of the world its more commonly rated "X".
Key phrase being "grabbing boobs"
https://www.youtube.com/watch?v=CgXt7xJT-h4&t=48s
(0:51)
and there are lots of other examples, like when they play games, their faces/expressions!!
asking bc i wanna hear what different people say, i say it IS ecchi. i was suprised when i saw lots of diff people claiming its not because theres no ‘fanservice’ but i think thats up to debate tbh