As in, stories between, say, 1 to 3 volumes long. Stories like these:
Heptagon, Chiaki Hijiri - 24-year-old Nana is drifting through life, not connecting with anyone, when she's hit by a car and wakes up 14 years old again -- with all her 24-year-old memories. Unless, of course, it's a dream. Or a posthumous fantasy. Either way, she has to relive that time of her life to remember why she's the way she is now. I especially like how middle school's easy for Nana the second time through, with a college degree behind her, and that this makes her popular in a way she never was before. A powerful drama, with a sister relationship at its center, complete at 1 volume (and hosted here, though the last chapter's in Latest Downloads).
Blue Sky Playground, Mota Kurasawa - Okay, yeah, so the initial set-up looks standard: energetic girl and popular twin brothers, one cool and distant and one an energetic guy who pushes her around. Looks kinda like Parfait Tic Lite, really. But the story has enough sense of humor that it doesn't exactly go by the numbers, even when it walks us straight into the love triangle. I especially love how, when Mirita walks into their clubroom, we get close-ups of each boy with bishie sparkles, and she hesitates, not quite believing her eyes, before going straight for her beloved, the kotatsu (heated table). Scans are partway through volume 2 of 2.
Hybrid Berry, Ayume Komura - Yay another shoujo baseball manga. Okay, so the story is more about her relationship with the guy who keeps missing grounders that threaten her flower-beds, but it's also about her discovering an interest in something (baseball) outside of gardening -- something she's good at. It's no Crimson Hero -- indeed, the story I want to compare it to most is Ookiku Furikabutte, despite having *nothing* in the way of tense, multi-volumes games -- but quite enjoyable so far. Scans are through volume 1 of 2.
Random Walk, Yoshizumi Wataru - Watch Yuka karoom through relationships the way some people free-associate conversations. By which description you can tell this is no Marmalade Boy. Not very deep, but it takes its issues seriously. Scans complete at 3 volumes.
What short, sweet stories out there have you been enjoying?