Tawawa on Monday: Season 1 - Ai-chan and the Stairs to Adulthood (2016) - (S1E12) - Backdrops — The Movie Database (TMDB)

One Monday morning, Salaryman asked what Ai did during the Christmas day, which she initially refuses to answer. Later, she revealed that she 'has taken a step into adulthood', becoming from 'I-chan' to 'J-chan'.

Getsuyoubi no Tawawa (Tawawa on Monday)

Tawawa on Monday (TV Series 2016–2021) - IMDb

Tawawa on Monday (TV Series 2016–2021) - Episode list - IMDb

Bunnicula: Season 1 (2016) — The Movie Database (TMDB)

Tawawa on Monday: Season 1 - Ai-chan and the Stairs to Adulthood (2016) - ( S1E12) - Backdrops — The Movie Database (TMDB)

Tawawa on Monday: Season 1 - Ai-chan and the Stairs to Adulthood (2016) - ( S1E12) - Backdrops — The Movie Database (TMDB)

Getsuyoubi no Tawawa (Tawawa on Monday)

Ranma ½: Season 1 (1989) — The Movie Database (TMDB)

Bunnicula (TV Series 2016-2018) — The Movie Database (TMDB)

Tawawa on Monday (TV Series 2016–2021) - IMDb

Tawawa on Monday (TV Series 2016–2021) - IMDb

Tawawa on Monday - Wikipedia

Tawawa on Monday Anime Gets 2nd Season With Episode 1 Now Streaming (Updated) - News - Anime News Network

Tawawa on Monday: All Episodes - Trakt