my that was adorable, I have been waiting for those for some time thx a lot chilled bones. in the first Seiko is such a silly ler but it shows she is having a lot of fun tickling Naomi, it's so silly is adorable, and Naomi's laugh is adorable too.
in the second escene both girls are actually tickled, the blond girl trys to save the one in the bed and get's captured and tickled too, her laugh is awesome, so nice~
I only wish I could understand what are they saying, and there should be a desperation scene with one character being tickled by the ghost but has to hold her laughs or arms up or else a trap is activated or something, corpse party could easly do a thing like that and It would be an interesting sight watching the ghosts tickling playfully a girl trying her best to hold it.
by the way there is one scene where Naomi tickles Sekio (the girls of the first vid) so Seiko is very ticklish in canon~ here is the link
youtube.com/watch?v=YfDlaPzLV1s
minute 28.