Can anyone answer me if 망가 is on going 또는 not !? Cause there is no update about it since months . Are they planning a 다음 season 또는 what ????

The 망가 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 사랑 with Takano.
For other official news, i suggest 당신 to 검색 on twitter: @marukawashoten (sorry, the site it's only japanese)