Can anyone answer me if komik jepang is on going atau not !? Cause there is no update about it since months . Are they planning a selanjutnya season atau what ????

The komik jepang it's on going, don't worry.
On the december issue it's released chapther 20 of "Onodera Ritsu no Baai". So, be needed only 75 days to Ritsu for to be fully to fill in cinta with Takano.
For other official news, i suggest anda to cari on twitter: @marukawashoten (sorry, the site it's only japanese)