Over a year later and absolutely nothing new going on with the title, they're celebrating Natsuki's birthday (August 28) with a noitaminA shop & cafe event like they did with Yuki & Haru's.
They've also drawn something new for the occasion, the most precious Usami family photo ever with the new addition to the family:
Just look at how happy they are (especially Natsuki's proud new big brother face). I can not stop loving this show. Ever. Clearly the staff feel that way too.
They're also serving Natsuki's curry during the event period: