There are 13 chapters total and two 0.5 parts. Without spoiling, all I will say is: don't worry.
Have you found the raw ?
https://www.yaoiotaku.com/forums/topic/40830-shoutotsu-futatsuboshi-sakusen-9733-homura-jiiko-jp/
yo.. I know it's been 2 years since you commented, but do you by any chance still have the raws on you? The links there are broken ╥﹏╥
There are 13 chapters total and two 0.5 parts. Without spoiling, all I will say is: don't worry.