No Shame in 2nd (二位だっていいじゃない, lit. Nii datte iijanai), is the first stage for the Silver Week event.
When the battle starts Those Guys and Snache will appear and another pair will appear shortly.
When the enemy base drops down to 90%, expect an enemy shockwave plus Steel Snache appears with Those Guys and 2 Doges, then the enemy base will spawn some Those Guys and a Doge afterwards.
Strategy isn't that much hard. Just send out a wave of meatshields or critical hitting units to deal with the enemies, they aren't that troublesome.
Once you beat the stage 1 event gacha ticket will be rewarded guaranteed. Subsequent finish of the stage may net a event gacha ticket at a 30% chance.