Refill for Bible-sized system notebooks. It uses paper that is difficult to slip out and has high writing quality, making it stress-free to write. The light gray that does not interfere with the color of the pen suppresses the whiteness of the paper itself, so it is also characterized by the fact that the eyes do not get tired. By adopting a grid size of 6 mm, which is slightly wider than the general one, the ease of writing and the presence of the graph itself have been suppressed. 30 sheets