I tried to read the manga before touching the game and it made no sense. I suggest trying out the game first. There is a free demo version of it in English (officially translated) out there. The plot line is very interesting so I strongly recommend it. This manga is basically just 4-koma and small stories that poke fun at that story line, but don't do well on its own

Holy crap! Did I read the description wrong? A dating bird game? I've never, EVER literally laughed out loud from a description of any manga, or any readable item's summary for that matter, but this one got me. My eyes even teared up. I'm usually pretty open-minded to strange subject matters, but this... this one is... unique. And the flying rat's even wearing a tie that matches the guy's tie! I almost pissed myself laughing. What strange games people make. I can't help but to laugh whenever I see the image. And if the game is how I imagine it, oh God that's be hilarious. "My filthy, disease-ridden pigeon seems to like your filthy, garbage-eating sea gull. Let's let them share a cage and get to know each other. Maybe we could do the same...?" Toss in a tragic event every now and then to mix things up. *Your filthy pigeon is attacked by a sparrowhawk! You bird lost many feathers, the use of one wing and one eye. It always makes strange wailing sounds now! Your popularity level drops because you pigeon grosses people out!* and *Your pigeon gave you and [random girl] hystoplasmosis! You survive... but she dies! Her family blames you! The guilt makes your popularity level drop because nobody likes a gloomy guy with a pigeon! Creepy~!* Oh, the possibilities are endless.