In these episodes Kei's love for Mizuho is put to the final test,
where he must choose between staying with the woman he loves, or the well being of one of his friends. The jokes have all been spent and the story takes a very serious turn as it begins to reach it's climax. Koishi still has her eyes on Kei, and she now has Ichigo backing her up in her pursuit.
My only real complaint is during an emotionally intense argument between Kei and Mizuho. The video comes so very close to pulling at your heart string, and creates the beginnings of a lump in your throat, but falls short in my opinion because of Kei's english voice, which doesn't carry the passion or emotion the character should be feeling, and comes out kinda "whiny".
Still an very excellent and worthwhile purchase, my only warning is that if you buy Vol. 3 you'd better be prepared to buy Vol. 4