Girlfriend Limited to 7 Days.

The story begins when Manatsu, a gal who is on the verge of repeating a grade, starts receiving tutoring from Sumie, an honor student. Manatsu loves shoujo manga and romantic gossip but has the vague feeling that having a boyfriend somehow doesn't fit her. When she casually brings this up, Sumie suggests, "Why not try starting with just the form?" and offers "How about dating me for just 7 days?"

19 chapters

• Chapter 15.5 — Volume 3 Extras
• Chapter 15 — Anniversary
• Chapter 14 — Girlfriend Not Limited to 7 Days
• Chapter 13 — I Like You
• Chapter 12 — A Straight Line
• Chapter 11 — From Far Behind
• Chapter 10.5 — Volume 2 Extras
• Chapter 10 — Sumie Nagi
• Chapter 9 — Verdant Breeze
• Chapter 8 — Ripples
• Chapter 7 — Don't Let This Night End
• Chapter 6 — Summer Rain
• Chapter 5.2 — Volume 1 Twitter Extra
• Chapter 5.1 — Volume 1 Extras
• Chapter 5 — The Night Before
• Chapter 4 — Reflections
• Chapter 3 — True Colors
• Chapter 2 — A Bit of Heat
• Chapter 1