-[Their or their little thoughts, all of them, are stored in this small box. ]-
Things to note:
·The author often has some weird ideas popping up in his mind.
·The male protagonist of each volume is different, so please pay attention... The content is [what XX and XX did on Valentine's Day, what they wanted to do, and what they encountered], but the situation in the Yamamoto volume has gone off the rails ||||
·The heroine is original, and the official supporting role is perfect.