That night Holly can’t sleep. The house feels stuffed with heat, but when she kicks off the duvet a chill flattens itself along her back. She listens to Mum and Dad going to bed: Mum’s voice still rising faster and happier, dropping suddenly now and then when she remembers Holly; the low rhythm of Dad adding in something that makes Mum laugh out loud. After their voices stop, Holly lies there in the dark on her own, trying to stay still. She thinks about texting one of the others to see if she’s awake, but she doesn’t know which one, or what she wants to say.

‘Lenie,’ Holly says.

It feels like stretched hours before Selena, face down on her bed reading, looks up. ‘Mm?’

‘Next year. How do we decide who shares with who?’

‘Huh?’

‘Senior rooms. Do you know who you want to share with?’

A thick skin of rain coats the window. They’re stuck indoors; in the common room, people are playing a nineties edition of Trivial Pursuit, trying out makeup, texting. The smell of beef stew for tea has somehow made it all the way up from the canteen. It’s making Holly feel slightly sick.

‘For fuck’s sake,’ Julia says, turning a page. ‘It’s February. If you want something to worry about, how about that stupid Social Awareness Studies project?’

‘Lenie?’

Senior rooms hang over the whole of fourth year. Friendships go down in flames and tears because someone picks the wrong person to share with. All the boarders spend most of the year edging carefully round the choice, trying to find some way to navigate it undamaged.

Selena gazes, lips parted, like Holly’s asked her to fly a space shuttle. She says, ‘One of you guys.’

A flutter of fear catches at Holly. ‘Well, yeah. Which one?’

Nothing out of Selena; empty space, echoes. Becca has felt something in the air and taken out her earbuds.

‘Want to know who I’m going to share with?’ Julia asks. ‘Because if you’re going to start getting hyper about stuff that isn’t even happening yet, it’s definitely not you.’

‘I didn’t ask you,’ Holly points out. ‘What’ll we do, Lenie?’ She wills Selena to sit up and think about it, come up with an idea that makes sure no one’s feelings get hurt, that’s what she’s good at; names out of a hat maybe – please Lenie please . . . ‘Lenie?’

Selena says, ‘You do it. I don’t mind. I’m reading.’

Holly says, feeling her voice too loud and too sharp-edged, ‘We all have to decide together. That’s how it works. You don’t get to just make the rest of us do it.’

Selena tucks her head down tight over her book. Becca watches, sucking the cord of her earbuds.